This is a 2 part assignment. Please follow the directions below and complete both parts for a total of 10 points.
1.Watch the following YouTube.com video clip on acids, bases, and indicators:
"Acids and Bases and You"
Comment on something you found interesting in the video.
2. Using the pH paper given to you in class, test the pH of two things at home. Check your color against the pH scale here. Answer the following questions: What did you test? What was the pH of each item? Were you surprised at the pH, or was it what you expected?
This is due by Monday 5/17.
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1. I thought it was interesting that you could make a pH indicator out of red cabbage. If you take the cabbage and boil it in water and then take the purple colored juice then add the solution you are testing and place it in the cabbage juice it will change colors depending on if it's an acid or base. It will turn a darker red color if it's an acid and a more blue color if it's a base! :)
ReplyDelete2. I tested a peach mango flavored Fuze and the pH turned out to be 5. This was expected because fruits tend to be acidic. I also tested Vitamin water (blueberry-pomegranate flavored) and it turned out to be pH 4. I was actually surprised because i thought it contained mostly water and would be towards the more acidic-neutral side like between 6-7.
Alex Mezouari
ReplyDelete1. I thought also as Ashley thought that it was interesting that ph could be made out of red cabbage. I think as a class we should try to make our own indicator, just for fun. I also thought that it was intriguing that our blood has a neutral ph. It was also interesting that the ph of drinking water is neutral and the ph of tap water ranges from 7 to 8.5. this may possibly be why we should not drink tap water because it is not neutral like our blood.
2. I tested my urine because i was curious what ph was coming out of my body. It turns out that my urine had a ph of 7, which is neutral... YAY!!! I guesssed that this would be the case because my pee was almost the color of water; water has a neutral ph as well. I am proud to say that i have healthy pee and science proved that because I am pretty sure you strive for a neutral ph of urine. I also tested my nail polish remover and it had a ph of 8, thus being slightly basic. It was cool to find out the ph of things that you use and see everyday.
1. The video was very interesting-I never knew you could make a pH indicator at home out of cabbage and boiling water. It is a very simple process that you can do at home to determine the pH of everyday items. Also, it was interesting to see the pH of everyday water (including pool water).
ReplyDelete2. I tested a Starbucks frappuccino drink and found that the pH was 3; making it an acid. I also tested maple syrup and found that the pH was 4; also making it an acid. I was surprised how high the acidity of the maple syrup and frappuccino was, but I predicted that the frappuccino drink was going to be acidic because it contained milk.
1. I thought that the video was very informational, I learned a lot that was very surprising! I think it is so strange how tap water doesn't always have the same pH level. It was also cool to learn how our blood is neutral and is kept that way by some of our organs.
ReplyDelete2. So for this experiment I tested Windex and soy sauce. Windex, I discovered, is a base with a pH level of 9. The soy sauce on the other hand had a pH level of 2, thus making it an acid. I found it really interesting that soy sauce is such a strong acid, I didn't predict that at all!
1)I thought the video was interesting. One thing I learned was that you can make a pH indicator out of red cabbage. It will turn a red color if it's an acid and a more blue-ish color if it's a base.
ReplyDeleteI also learned that human blood has a pH of 7.5.
2) For the experiment, I tested Saline Solution (what I use for my contacs) as well as a Neutrogena acne wash. The contact solution turned the paper a light green color (pH level of 4), while the acne medicine turned the paper a light blotchy green color (pH level of 3). I had no idea going into the experiment, but I wasn't surprised that both are acidic.
-Caroline Patten
1.) In watching the video, I learned that red cabbage contains naturally occurring pH indicator. It is interesting that this common household item can be used to investigate the pH of other common household items; this demonstrates how science can be easily experimented with and applied. Additionally, it was interesting to learn the many places where pH must be regulated (in the bloodstream, in aquariums, in pools, etc).
ReplyDelete2.) Using the pH paper given in class, I tested the pH of sunscreen and hairspray. The sunscreen (Banana Boat, SPF 30) was basic, with a pH of about 9. (The pH paper turned a dark teal-ish blue.) The hairspray (Garnier Fructis, Full Control) was slightly acidic, with a pH of about 6. (The pH paper turned a yellow-tinted green.)
-Vivian Zhang, Period 1
1. I thought it very interesting that pH scales were used for brewery manufacturing. Kinda funny how the purpose for which we use the pH scale today has drastically varied from the beer industry. I guess a logical reason for them to use the pH scale would be so that people can buy more. What i truly mean to say is that keeping the pH level constant people's liver's can fail slower thus resulting in more profit from say heavy drinkers. Nifty tactic, keep the consumer alive just for so long so that the word gets passed on.
ReplyDelete2. For the two objects that i tested with the pH paper were soy milk and the tap water coming out of my fridge. The soy milk was around 9 which is close to regular milk. So i'm guessing that this is either good or really bad. Either one, the soy milk still tastes really good. Next i tested the tap water because the video said that tap water isn't neutral, and what do you know the tap water was an 8. Weird, now i'm concerned if that is bad or just ok. Considering that 8 is more on the side of basic and not acidic, which is good, but shouldn't all water be at a level of 7?
1. The video was interesting in that it mentioned that red cabbage can be used as a pH indicator. Before, I did not know that natural products could be used to differentiate acids from bases. I believe that in Chemistry class we should have a research project to find out what pH paper is made of. Perhaps it may even contain red cabbage.
ReplyDelete2. The two things I tested: my saliva (I know, gross!!!) and mouthrinse
The results were: saliva: blue-green, about 11 and mouthrinse: orange, about 1.
The results for saliva didn't surprise me, as I hoped that our mouths were not acidic. On the other hand, the results I got for mouth rinse surprised me. I didn't expect it to be so acidic, so now I feel scared using it so often.
-Adelyn Chan, Period 4
1.) I really like the cabbage lab! I thought it was a fun way for people to take a lab home and test the pH of anything! The video was super interesting and I want to try the lab really badly. Maybe we could do it in class! I also liked how they showed the pool and how the pH level had to be taken care of constantly to ensure a safe environment!
ReplyDelete2.) Tap Water: I was really surprised that I got pH 9 for my tap water because that’s a low base and its supposed to be neutral. It turned a bluish-green color. I was excited to learn about the pH of the water in my house though!
Coffee Mate: I got a pH 8 on the coffee mate which I kind of expected but it was still really cool how fast the indicator changed color! It turned a greenish-blue color. It was really fun to try something at home!
1. I found it interesting that blood has a pH level of between 7.35 and 7.45. I would've figured that it would have been neutral, not slightly basic. The use of red cabbage as an indicator was also interesting. Very informational video!
ReplyDelete2. Common Household Bleach: Had a pH level of 12. This was surprising to me, as I was under the impression that it was more acidic.
Coca-Cola: Had a shockingly low pH of about 3. This kind of makes me reconsider the amount of Coke I drink. I had no idea that it was that acidic.
1. I thought the video was very informative. The part I found most interesting was about the pH in aquariums. I thought it was cool that salt water fish thrive in water that has a higher pH and that freshwater fish enjoy water that's more acidic. I also thought that water was only 7 on the pH scale, this video taught me that water can have a range of pH values and that it can even be adjusted (Like in public swimming pools).
ReplyDelete2. Using the pH paper I tested some perfume and a makeup remover. The both were somewhat acidic. The perfume was around a 4 or a 5 (let's just call it 4.5) and the makeup remover was about a 6 or a 7 (6.5) I knew that the perfume would be acidic, but I thought that the makeup remover would be more basic seeing as most soaps and shampoos are a bit basic. I was glad that it wasn't really acidic because then I wouldn't really want to put it on my face every night.
1. It was interesting to me that red cabbage can be used to make an indicator. I never would have expected it to be able to do that. I also thought it was weird that different sources of water have different pH levels, but i guess that it would be different because tap water comes into contact with chemicals and stuff that would throw off the pH balance.
ReplyDelete2. I tested Peridex (Chlorhexdine Gluconate), which is an oral rinse agent. It had a pH of three, which makes sense because plaque has a slightly more neutral pH and a more acidic substance would kill it off. I also tested the pH of eyedrops and it was 8, which i thought also made sense because it would reset the pH of eye fluids and cause it to be at a more comfortable level.
Sean Hnedak p.1
ReplyDelete1. While watching the video, the coolest facts to me were that the kidney and lungs regulate the pH of your blood. I knew the kidneys control a lot of things in the blood, but i never thought about ph! Also, i found it suprising that the ph of tap water can differ from 6.5 to 8.5, seems like to big of a margin if you ask me. Good thing we have water filters.
2. I tested my fish tank's water. It had a ph between 7 and 8. It doesn't exactly suprise me, considering its just water, but with the bamboo, fish and algae in the water, i thought there might be some difference. I also tested some acrylic paint mixed with water. It had a ph of 8. I wasn't really sure what to expect for that one. But then again, it was mixed with water.
1. I found the cabbage indicator very interesting. It was surprising to me that the water left after the cabbage was left in hot water was considered neutral, even though it was purple in color and that the cabbage had been sitting in the water. I expected the cabbage-water to be a base, not neutral. I was also surprised that fresh water fish thrive in acidic water (around 5. 5 pH), because I would think they would need very clean non-acidic water to survive.
ReplyDelete2. I took the pH of a plain Starbucks coffee (without anything added), and found the pH to be around a 5 or 6, and I was surprised because since coffee is so bitter I thought it would be considered a base. I took the pH of olive oil and found it to be around a 9, which wasn’t surprising because olive oil is slippery; making it a huge hint to proving it’s a base.
1. I thought it was interesting that cabbage can be a pH indicator. I would've never guessed cabbage could do that. Also, it never occurred to me that certain kinds of fish need to live water with certain pH's. I thought they were all the same.
ReplyDelete2. I took the pH of apple juice, and learned that the pH was about 2.5. I was surprised because lemon juice has a pH of 2, so i figured that apple juice would be about a 4 and not as close to the pH of lemon juice. I also took the pH of regular hand soap, and the pH ending up being 6. This wasn't surprising to me because I thought it would be pretty close to neutral.
1. I found the video surprisingly informative, especially the red cabbage lab like every one has said. I also never realized how useful the pH is and how common it is tested. For example in pools, I never knew that they checked the pH level every hour, let alone at all.
ReplyDelete2. First, I tested the pH of Diet Dr. Pepper and it turned out to have a pH of 3. I did not find it too surprising. Second, I tested the pH of Hand Sanitizer, and it had a pH of about1.5(?) but it is really hard to tell exactly. And I am very surprised by this because I definitely would have thought it would have been more basic.
1. I found it interesting that tap water is not usually neutral, as compared to pure water. This shows that the water we drink on a daily basis is not necessarily clean or free of impurities. I also found it interesting how you can use red cabbage as an indicator, and I wondered why it is that red cabbage particularly works for this experiment. Another surprise was that our blood is neutral.
ReplyDelete2. With my pH paper, I decided to test pool water and contact lens solution. Both turned the pH paper a green color, which means they are both bases with a pH of about 8 or 9. I wasn't really surprised, but it was interesting to see. Although the water is neutral, the chemicals in the pool water are probably what make the solution basic in order to keep the pool clean and healthy.
-Naomi Stapleton (Period 4)
1. I found it interesting that the pH of pool water is between 7 and 7.6. I never knew that the water was that neutral. Also suprising is that our blood ranges from 7.35 to 7.45
ReplyDelete#1 Something that I found interesting from the video was that red cabbage is a naturally occuring pH indicator and that one can create their own indicator by simply soaking cabbage in boiling water. I also found it interesting that ordinary water (water that is used for cooking, drinking, and cleaning) has varying pH levels (ranges from 6.5-8.5).
ReplyDelete#2 The two items that I tested were pool water and Tobasco sauce (hot sauce). The pool water had a pH of 8 while the Tobasco had a pH of 1-2 (the color that the pH strip changed to was in between the colors of 1-2 on the corresping pH chart). I was not surprised at the pH of my two tested items; I was positive that the hot sauce would be very acidic and figured that the pool water would be basic.
1. In the YouTube video, I found it interesting that red cabbage can be used as a pH indicator if you pour boiling water over it. It was cool how the purple liquid it left behind would turn blue when a base was put in it and how it would turn a red color if an acid was put in it. It was a good video in terms of it helping me understand it a little better. The music was annoying, though, especially on the red cabbage part of it.
ReplyDelete2. I tested BBQ sauce and iced tea. They both would rank a 2 according to the scale on this blog. However, I would think it would be more of a 3 because both those things aren't really sour like lemon juice or vinegar, which are listed on that scale for 2.
Everyone is going to see I did this on a Saturday night. :-]
1. I thought it was interesting how the red cabbage can indicate PH.
ReplyDelete2. I tested my pools water and coffe. the pool was a 8 which I think its supposed to be. The coffee was a 5.
1. I found it interesting that orange juice is a weak acid. I thought it would be a stronger acid and have the same pH as lemon juice. However, the pH of lemon juice is higher than orange juice.
ReplyDelete2. With my pH paper, I tested Almond Milk and Rice Milk. Surprisingly, the rice milk was more of a light green color, around a 7 or 8, and the Almond Milk was more of a teal color, around a 9 or 10. I was surprised because I thought they would have had closer pH's. I was also surprised because normal milk has a pH of around 6 so it is an acid. However, the almond and rice milk were both bases.
1. it was interesting to find that a base was a corrosive substance. also it is interesting that red cabbage can be used as a pH indicator!
ReplyDelete2. i tested a bottle of water that had been sitting in the sun... the pH ended up being 8. then i tested face lotion and found that it was a 3.
1) I thought it was interesting that pools need to be tested every hour to make sure that the pH scale is between 7 and 7.5. If it is anything below or above it is considered not healthy. I also thought that it was interesting that a base is corrosive since I would have never guessed that.
ReplyDelete2) I tested a tomato and found that it had a pH of 4. I also tested pickle juice and saw that it was about a pH of 5. I was surprised to find out that the tomato was more acidic then pickle juice since pickles are soaked in vinegar.
1) I thought it was interesting to learn how to calculate the value of pH. It never occurred to me to find that out. It was also interesting to see how to make the red cabbage indicator.
ReplyDelete2) I tested acai juice and dijon mustard. Both had a pH of 2. I was not sure what to expect, but I didn't think that either would be so low.
1)I did not know that the liver and kidneys regulated pH,I also did not know that red cabbage could be used as a pH indicator.
ReplyDelete2)I tested diet coke and got a pH of 4. I tested a sample of colon and found that it was a 5. The Diet coke was what i expected, but i had no idea on the cologne.
1. I found it really interesting that the pH of the the water in aquariums depended on the types of fish. I also found it interesting that human blood is very close to being a neutral. I think the cabbage indicator experiment would be a cool thing to try in class, and test the same things we did in the pH lab and see if we get similar or different results.
ReplyDelete2. I tested my perfume which turned out to be acidic it was around a 3, which i wasn't expecting, but i guess thats why they say to prevent from getting it in your eyes! The other solution I tested was diet coke, I got the same pH as my perfume, 3, according to the pH scale that is linked above thats what a soft drink should be, but i was still somewhat surprised that soda would be that acidic.
1.) I thought, as some other people have said, that it was interesting that organs in our body work to balance the pH levels in our blood. I also learned the names of the indicators that are used in chemical reactions; Naphtholphthaleine, Phenophthaleine, and Thymolphthaleine.
ReplyDelete2.) I tested Ketchup and soy sauce. Although the food coloring in those foods may have slightly skewed my data. Ketchup was an acid with a pH of 2. I never realized how acidic Ketchup was, it surprised me. The soy sauce had a pH of 1. I knew by looking at the ingredients that soy sauce would be an acid because it had vinegar in it, but I was surprised how the other ingredients in soy sauce lowered the pH even more.
1)It was a really cool video! I thought it was fascinating that the video showed how to make a red cabbage indicator. I wonder what is in the red cabbage that allows it to change color when mixed with an acid or a base. It would be interesting to find out if red cabbage is the only food that can be used as an indicator.
ReplyDelete2)I tested bottled Perrier sparkling natural mineral water, which had a pH of 8. This was surprising because Perrier is similar to soda-pop, so I thought it would be acidic (As most soda pops have sodium benzoate, a sodium salt of benzoic acid, added as a freshness protector, but it is most useful in preserving acidic foods). I also tested the In-Sink-Filter-Purified water in my house; it has a pH of 7. The results of the purified water are as expected because that means that the purifier is working as it should.
--Liberty Adair (Period 3)
1. One interesting fact I learned from the video was about the pH of aquariums. I assumed that saltwater fish needed a more basic environment since saltwater is basic, however I was surprised to learn that freshwater fish preferred a more acidic environment, instead of just a neutral one. Now I understand why when I had pet fish, we'd have to keep track of the pH.
ReplyDelete2. For the two pH tests, I tested hand sanitizer (the kind where you don't need water), and soy milk. The hand sanitizer turned a yellow-orange color, of roughly pH 2, and the soy milk turned light green, roughly pH 4. I wasn't surprised that the hand sanitizer was acidic, but I was surprised that soy milk was. I thought it'd be more neutral or basic.
~Melody Jung (per. 1)
1. I thought that it was interesting that the water from the red cabbage was considered neutral, even though the red cabbage probably isn't. I wonder what other household items can be used as pH indicators. And what is it in the red cabbage dye that makes it able to indicate the pH level?
ReplyDelete2. I tested egg whites, and found the pH to be around an 8. I was surprised that it was almost neutral. I thought that it would be more around a 9.5. Out of curiosity, I also tested the egg yolk. I found that it was about a 6. This was surprising to me, as it is suspended in the white, which is basic. I wasn't all that surprised, however that it was almost neutral. The embryo couldn't develop if it was too high or low of a pH.
1. In the video I was interested to learn that blood is slightly basic. I had assumed that it would be completely neutral.
ReplyDelete2. First I tested the glass of apple juice I had for lunch. As expected its pH was about a 3. Then I tested the water from my shower and I was surprised to learn that it had a pH of 8. I thought it would be more neutral.
Ben Houston
Period 4
1. I was very interested to learn that a natural pH tester can be found in red cabbage, and is attained by putting it in boiling water. I also did not know that blood was slightly basic (7.35-7.45) i always thought that it was a neutral 7.
ReplyDelete2. I first tested an apple, which had a pH of about 4. I actually assumed that it would be slightly more neutral than this. I then tested my milk, and was astounded to find that it had a pH of 5, even though the scale says it should be at 6 ( I must have wierd milk).
1. I found it interesting that red cabbage can be used as an indicator. I always thought that you needed to use a chemical, so I was surprised when i learned you could use something natural.
ReplyDelete2. On one pH paper I tested hand sanitizer. It was a 1 which surprised me because that seems to be very strong to be using on a regular basis. The second pH paper I tested was perfume. This turned out to be a 2 which didn't really surprise me because I know that perfume has strong elements in it.
1. What i found interesting was that the pH scale was founded in the early 1900s, and it was initially used in the brewing industry. I also liked how it said the average what we use daily has a pH of 6.5-8.5.
ReplyDelete2. I first tested the sink after my mom cleaned it with an ammonia product, it's pH was 11. Did not find this surprising do to the harsh smell. I then tested some dr Pepper that had been sitting out and I saw that the pH was 4. the scale seemed to be pretty accurrate.
1) I thought it was interesting that common house hold water can have a pH range of 6.5 – 8.0. I never thought of water as an acid or a base before.
ReplyDelete2) I tested lemonade made from a store bought can and found that its pH was about 3.5 which wasn’t shocking because lemonade should be acidic. But then I tested chocolate milk and found that its pH level is about 6.5 which surprised me. I never knew that chocolate milk had acidic ingredients.
-Michael Kinney
1. I thought it was interesting that certain fish could live in different pH levels than others. The red cabbage indicator was also interesting, because I'd never heard of that before.
ReplyDelete2. I tested toothpaste, which had a pH level of 8, and Strawberry-Kiwi juice, which turned out to be a 3 pH level. I was surprised at the toothpaste, because I thought it would be more acidic.
1). I think it is cool that you can use red cabbage as an indicator. I didn't know that before. I also didn't realize that the swimming pools are tested for safe PH levels.
ReplyDelete2). With the first piece of PH paper I tested nail polish remover and it came out at a level of 2. That didn't surprise me. And with the second one I tested conditioning spray. It also came out as a 2. That surprised me i thought it would be more basic.
1. I thought using red cabbage as an alternative indicator was pretty cool. I also found it interesting how water isn't always neutral.
ReplyDelete2. The first thing I tested was orange juice. Its pH was a 3 which is what I expected since it sort of tasted acidic. Then I tested sunblock. I was surprised because I expected it to be a base but it turned out to be a 2/3
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ReplyDelete1. I found it very interesting that they have to continually test the pH of pool water in order for it to be safe for people to swim in. I've never seen someone testing the pH level of a pool before.
ReplyDelete2. I tested my brother's saliva and WD-40. My brother's mouth turned the pH paper a greenish-blue, so I'd say it had a pH of about 8. I wasn't really surprised that my brother's mouth was a weak base, because I expected it to be close to neutral. The WD-40 turned orange-y yellow, so it had a pH of about 2. I didn't know what to expect for the pH of the WD-40, but I was surprised at how acidic it was.
1. I didn't know that certain fish do better living in different pH levels than others. Also it's cool that red cabbage can be used as an indicator.
ReplyDelete2. First I tested contact solution and it turned the paper a greenish color, probably between 7 and 8 on the pH scale. Then I tested perfume and found the pH to be a 2. I wasn't really surprised by either because I didn't think the solution would be too far away from neutral and I thought the perfume would be pretty acidic because it's very concentrated and has a strong smell.
1. The video overall was very informative, but I NEVER thought that red cabbage could be used as a pH indicator! I will never call red cabbage a disgusting vegetable again (still won't eat it though).
ReplyDelete2. The first substance I tested is a benzoyl peroxide [(C6H5CO)2O2] acne gel, and its pH turned out to be 2, and this is expected because, as the chemical formula shows, hydrogen is present in its chemical structure. I also tested saliva (out of pure curiosity) and it turned out to be 7, which didn't surprise me very much because the majority of saliva is water, however, because it was saliva, which has a number of chemicals for food breakdown, I was expecting a little more acidity from it.
i was surprised to find out that red cabbage could be used as a pH indicator. Acids cause the indicator to change colors to a dark red, whilst bases cause the indicator to change to blue and green. it was also interesting to know that blood is close to a neutral and that the body parts help keep it this way.
ReplyDeletei tested my contact solution, which turned the paper to a light blue-ish green color so it had a pH level of 4. i also tested my nail polish remover and it had a pH of 8. i thought the nail polish remover would be more basic because other cleaning objects, like soap, are basic.
I found it interesting that the pH scale was developed for testing in breweries, and that the change per number on the pH scale is exponential, like the seismic scale. I also did not know that red cabbage was an indicator, or that tap water was not neutral and could have a pH of 8.5.
ReplyDeleteI tested the water in my spa and some Cascade dishwasher detergent. The spa water was between a 7 and 8, matching the video which said pool and spa water is usually about 7.5. The Cascade detergent was a very dark blue, about an 11. The spa water wasn't surprising after the video, but I would have expected it to be slightly acidic, not basic. The Cascade matched the soap test we did in the pH lab, and was what I expected.
1. I found it interesting that you can use red cabbage as a pH indicator and that our blood has a pH of 7.35-7.45.
ReplyDelete2. The first thing I tested was apple juice which had a pH of 3, which I had thought would have been more around a 4 or a 5. I also tested orange jucie which had a pH of 3.5 which is around what I thought it would be.
1. The video was very informative but her voice was boring, anyways the cabbage part was very cool I might try that. But the most interesting part was how fish need a different pH level to live. Also how pool water needs to be tested every hour to see if is safe.
ReplyDelete2. So I tested Orange Juice and Axe Spray. When I tested orange juice it was a 1 which is to be expected because it taste like an acid. Next I tested my deodorant, because i was curious, and it turned out to be a 1 it was very surprising because it like putting acid on you skin.
1. I thought the part about pool water needing to have a pH level around 7 was interesting I had always assumed that pool water was just naturally acidic because of the chlorine.
ReplyDelete2. I did not test anything because I had to leave class early and did not reseve any pH paper.
1) I'm amazed that it would be that simple to extract the indicator chemical from the cabbage, they did not even need to heat up the water or any thing.
ReplyDelete2)the first substance that i tested was Windex all purpose window cleaner, it had a pH of 11 witch was expected since it contains a large amount of ammonia. the second substance was sesame seed oil witch turned out to be neutral.
1. Something I found interesting was that cabbage can be used as an indicator.
ReplyDelete2. I tested yellow gatorade: pH 5, and pool water: pH 7.5
I was kind of surprised that yellow gatorade was 5 because I thought it would be lower because of the lemon. I was not surprised of pool water because if you were swimming in an acidic or basic solution it would not be healthy.
1. I thought the video was very interesting and filled with lots of useful information about acids and bases. Even though the video covered the basics on the chapter we are learning now, acids and bases are a lot clearer to me now. One thing that I thought was interesting was that red cabbage could be cut boiled and strained and the juice could be used as an indicator. I thought indicators could only be chemicals that were found in a lab not in the grocery store.
ReplyDelete2. The first thing I tested was the pH of my pool water. The pH was about 6.2. I was very surprised because I thought that the pool would be a more acidic because the pool is chlorinated. I thought the pool would be about a 3 or 4 on the pH scale. The second thing I tested was conditioner, It had a pH of about 4. I was kind of expecting this pH because I was guessing that conditioner would be acidic, but I did not what the exact pH would be. I did not know that shampoo and conditioner are on almost opposite ends of the pH scale, I thought that they would be about the same.
-Lauren Little
sam kang
ReplyDelete1.i found interesting that i could make a ph indicator with household material such as cabbage.
2. first i tested orange juice which had the ph of 4 which is an acid and i wasn't surprised by this. Then i tested my contact solution and which also had the ph of 4 and i was very surprised by this.
1. i found it very interesting that cabbage contains a natural acid base indicator and that the lungs and kidneys regulate the pH of blood in our bodies.
ReplyDelete2. I was unable to test two different solution because i was absent friday and did not receive any pH paper
Jack Kahn
ReplyDeleteMacManus
Chemistry, period 3
5/16/10
1. I did not know that public pools needed to have their pH tested so frequently. I wonder if they test it with pH paper or if they have some more efficient indicator that they use.
2. I tested my saliva, I thought that it was going to be neutral but it was actually closer to having a pH of 6, making it a little acidic. Second, I tested Coka-Cola, which ended up having a pH of 3 which is much more acidic than I would have expected. Coke, however, is very corosive so I'm not very suprised that it is such a strong acid. Saliva also shares some corosive propertiess (I would guess since it is important for the beginning stages of digestion) so its no wonder that spit is an acid as well.
1. The video I felt was very informative, and will especially help me understand things during this unit. One interesting I noticed during the video, is the use of Red Cabbage as a pH indicator (just like what everyone else said :P). I would have never guessed you could use such a simple item to figure out the pH of another item.
ReplyDelete2. I tested a few household items that I drink/use frequently, and decided to test the pH of them. The first item I tested was, Blue Gatorade and found out that the pH was 3, this seems quite off from my initial prediction of a pH of 6. The second household item that I tested was Sink Water and I found that the pH of it was 6, which is slightly more acidic than pure tap water (but nothing's perfect :P)
I found it was interesting that tap water isn't always neutral, and that you can make a pH indicator out of red cabbage and hot water.
ReplyDeleteThe first thing that I tested was tomato juice and the pH was 2. I found this to be odd since it is supposed to be 4.1 on the given pH scale. The second thing I tested was coca-cola. It had a pH of about 3, which is very acidic and is probably why soda is bad for your teeth.
1. The video covered many good topics. I liked the part about using red cabbage as a pH indicator. I was interested in the reason behind why it is a natural pH indicator, so I did some research, and found that it contains a natural organic compound called Cyanidin, which has a red/orange color, and can change depending on what its pH is. Interestingly, Cyanidin is also what makes red cabbage an antioxidant.
ReplyDelete2. I tested common kitchen solutions. First, I tested Olive Oil, which has a pH of 2...highly acidic. I did not expect this because I thought the slippery oil and somewhat bitter taste would make it a base. I also tested filtered water, to see how the pH of the water plays a role in its purity...and what I found was that it had a pH of 5, which again, is acidic...my guess is that the minerals in the water that were not filtered out are causing a low pH.
-Michael V.
Period 3
May 16, 2010
Alyssa Harry.
ReplyDeletePeriod 3.
1. I found it interesting that red cabbage could be used as an indicator when mixed with neutral water. I also found it interesting that the pH of rain is 5.5. I wouldn't have expected it to be that acidic.
2. I tested teriyaki sauce and granite cleaner. The teriyaki sauce has a pH of about 2, making it very acidic. And the Granite cleaner had a pH of about 9, making it basic.I was slightly surprised about the granite cleaner having a basic pH, because I would have thought that it would have been acidic.
1) In the video I found it very interesting that a pH indicator could be made from red cabbage. I also never knew that in aquariums, the pH of the water should depend on what kind of fish you have. Salt water creatures need a higher pH than fresh water fish.
ReplyDelete2) I decided to test the saliva of my dog and the saliva of my cat. I expected them to have more or less the same pH. My dog's saliva turned out to be basic with a pH of 8, my cat's saliva was exactly the same. In addition, I tested the water in my jacuzi which I predicted would have a neutral pH of 7. I was a little surprised when it turned out to be slightly basic with a pH of 8.
1. After watching the video, I thought it was interesting that you could use red cabage as an indicator. It would have been fun to utilise in class with the pH paper. I also thought it was interesting that different types of fish needed different pH levels of water in order to survive; I didn't know that water has different pH levels.
ReplyDelete2. I tested the pH level of a can of Coke, and the pH level of pickle juice. The pH level of Coke was 3 and the pH level of pickle juice was 2. This was not surprising for both because Coke is acidic and pickles are sour, which is a property of an acid.
- Hannah Kent P.4
1. I didn't know that pool water could be at an unsafe pH level and that it would need to be monitored hourly to ensure its safety.
ReplyDelete2. I tested apple juice and it had a pH of 2, which was not surprising to me.
I also tested filtered water which had a pH of 6, which surprised me a little, because water should be neutral, not acidic.
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ReplyDelete1. I found it very interesting that red cabbage could be used as a pH indicator. I was surprised at how easy it was to make it into a useable pH indicator and I think it would be fun to try at home some time or do in chemistry class. I also found it interesting that the pH of human blood is 7.35-7.45. I never really thought about it before, but it makes sense that your blood is almost neutral.
ReplyDelete2. The two household items that I tested are apple juice and Regular Pepsi. The apple juice turned out to have a pH of 2-2.5. I found it surprising that it was more acidic than orange juice and other common fruit juices. The Regular Pepsi had a pH of 3. I wasn't surprised because I knew that soda was acidic. (This is probably why there are a lot of at home experiments with it like putting a rusty nail in it etc.)
-Brendan O'Leary Per.1
1. I thought it was interesting that red cabbage could be used as a natural pH indicator. I knew about the pH levels in aquariums and pools, and how they should be regulated, but I didn't know that the pH of blood was so important, and that the kidneys and lungs regulated that.
ReplyDelete2. First I tested the pH level of perfume. The color was a pale yellow so it looked like a 3. Then I tested the pH of orangina, and it looked like a 2. I wasn't surprised about the pH of orangina, because I thought it would be more acidic than regular orange juice. However, I thought that the perfume would be more basic than acidic.
-Heather Gillies, P.1
1. I thought the most interesting thing was how you can make an indicator out of red cabbage and water, also that depending on what acid or base you added to the cabbage juice it would change color. acids change the purple to a red hue where bases change the hue to a blue.
ReplyDelete2. the two items that i tested are coffee and pedigree wet dog food. the coffee turned out to be very acidic ending up as a pH of 2, and the dog food has a pH of 4. i was surprised that the coffee was so acidic i think that it tastes bitter black, the dog food i have never tried so i was not sure what it would be.
-Emma Clarke Per. 3
1. I didnt't know that the pH scale was invented in the 1900's by Dr.Sorenson and that it was first used by the brewing company. I also found it interesting that you could use red cabbage as an indicator.
ReplyDelete2. The two items that i tested were Dr.Pepper and bleach, Dr.Pepper was acidic it was a 4 and bleach was basic it was a 12. I didn't know that Dr.pepper was so acid I found that intresting.
1. I found it interesting that our organs worked together to keep our blood level close to neutral. I also found it interesting that you could use red cabbage as a pH test. The last thing I found interesting to see the pH scale written out by decimals. It really showed the difference in amount!
ReplyDelete2. I tested Dial Hand Sanitizer and Peppermint Tea. The hand sanitizer was neutral, which surprised me. I though that the sanitizer would be strong one way or another, because of how powerful it is. The peppermint tea was an acid. This surprised me again, since I thought it would be neutral. The tea had a pH of about 4. I'm not sure if I feel safe drinking this tea, anymore.
1. I thought the most interesting thing in the video was the use of the red cabbage indicator. It seems like a great application of our unit into everyday materials.
ReplyDelete2. The two items that i tested were apple juice and hair conditioner. The apple juice had a pH of about 2, while the conditioner had a pH of about 4. I was surprised by both of these results because being less sour than orange juice, i could not imagine it being even more acidic. In addition, the pH of the conditioner surprised me because i would imagine it to be more basic due to the fact that it is made up of soap, which is basic.
Nicole Sardo
ReplyDeletePeriod 3
1. While watching the video I found it very interesting that you can find the pH of any liquid by making your own indicator out of red cabbage. I also found out that baking soda is a base. I would have guessed it to be acidic.
2. The two things I tested were Scope Outlast mouthwash and Children's Benadryl. Using the scale provided the pH of the mouthwash was 4 and the Benadryl was 3. I was surprised about the Benadryl because I was expecting it to be more basic. Specially because the taste of it is not sour like. It is more bitter. The mouthwash I was not surprised about. I expected it to be acidic.
I found it interesting that the pH scale was originally utilized for the brewing industry. The red cabbage pH indicator was an idea I never would have suspected. I also found it interesting that everyday water, while presumably neutral, ranges from slightly acidic to slightly basic and isn’t as neutral as expected. The fact that various fish survive better in different pH levels of water is also intriguing.
ReplyDeleteI tested the pH levels toothpaste and orange juice and the results were pH 8 and 4, respectively. I was a little surprised by the toothpaste, because I expected it to be more acidic to combat the seemingly basic nature of plaque. The orange juice didn’t surprise me by being very acidic, as oranges and citruses in general are quite acidic.
~Dani Shapiro, Period 3
1. I found it very interesting that you can use red cabbage as an indicator to determine pH levels because cabbage has a pH level of 7 which means it is neutral and niether more acidic nor basic.
ReplyDelete2. I tested:
Watermelon = 4 pH
This suprised me because watermelon does not have the sour characteristic of an acid and it has alot of water which I would have thought to be more neutral.
Pancake/Waffle Syrup = 3 pH
I was very suprised that the syrup had such a high acidic level because it also doesn't have the sour characteristic of what an acid is. I also had thought before that syrup should not be made of very much acidic products but I may have been wrong
1. The video was quite interesting, i didn't really realize that bases were corrosive like acids, but now I know, as well as the fact that you can use boiled cabbage as an indicator for pH levels.
ReplyDelete2.The two things I tested was tap water and an energy drink. For the tap water i found a pH of 8 which was sorta what I was expecting because the water is more of a bitter taste rather than sweet. For the energy drink I got a pH of 2.5 which was really surprising, since as much as it has a sour taste and does have a bit of a tangy taste, I would have expected something a little less acidic, I feel now as if my teeth should have melted away by now.
Trevor Hougen
Period 1
Paloma Herrera; P.3
ReplyDelete1. Like everyone else, I found it interesting that red cabbage can be used as an indicator. The way it was made an indicator also fascinated me. I also found it interesting that the kidneys and lungs regulate the pH levels of blood. I would have never guessed that.
2. The two substances I tested were contact solution; that had a pH of about 8. I didn't find that surprising because I suspected that it was basic.
I also tested NyQuil. It had a pH of about 3. At first I was surprised to find that it was so acidic, but when I thought about it, it had alcohol and I really should not have been so shocked.
1. I never knew that boiled red cabbage could be used as a pH indicator, I thought that was really interesting. I also found interesting that different kinds of fish survive better in different type of pH.
ReplyDelete2. I tested my dog's saliva. It came to be about 9. That is basic. I never guess that, I thought that it would be acidic. I also tested my own saliva and it came out to be about 5 which is leaning towards the acidic side. I was also surprised by this because since my dog's saliva was basic I thought my own would be basic too.
1. Somethings I found interesting in the video were that the cabbage could be used as an indicator just by adding boiling water, the fact that the pH level of blood is neutral because I had thought it would have been acidic for some reason and that the lungs regulate the pH levels of your blood, I did not know that was a part of their job.
ReplyDelete2. One of the items I tested was Diet Coke which had a pH level of 4. I didn't find this surprised because carbonated beverages are supposed to be acidic. I also tested sink water which had a pH level of 8 which i also did not find surprising because water is supposed to be neutral but, like in the video, the added elements to tap water make the water pH level more basic.
1. I found it interesting that the pH level of the water used in an aquarium depends on the fish. Before watching this video, I never knew that red cabbage could be used as a pH indicator.
ReplyDelete2. I tested the pH levels of Coca-Cola and water from a small fish tank. The pH level of the soda was 3, which did not really surprise me because I had guessed that soda was acidic. The fish tank water had a pH of 9; this also did not really surprise me because filtered water has a pH of about 7, and I guessed that the cleaning solution in the tank would make the water more basic.
1. I found it interesting that red cabbage could be used as a pH indicator because it contains a natural substance used as a pH indicator already. Furthermore, it was interesting to learn that the kidneys and lungs function to regulate the pH level of blood, which is usually around 7.35 to 7.45
ReplyDelete2. I tested the pH levels of lemon juice and eggs. The pH level of lemon juice was about 2, making it very acidic, and the pH level of the eggs were 8, making it somewhat basic. I was not surprised by the pH level of the lemon juice because I expected it to be acidic, considering its taste, but I expected eggs to be completely neutral so I was a little surprised by that.
Alex Mueller
ReplyDelete1. The end of the video intrigued me the most with the red cabbage experiment. It does seem like a good thing to use to create a Natural Indicator. The information regarding the pH for aquariums was interesting too. I always thought they always used salt water with a lower pH, not a higher pH. Overall a very informative video, the music was kind of silly.
2. I tested a Starbucks frappachino, the color of the pH paper was bordering between a 7 and an 8, so I guess it would be considered more of an 8. It was right there to be considered a base but I thought it would be much higher because the taste was so bitter. The other one I tested was tap water, which ended up being an 8 spot-on. It made sense because it should be more of a base with it's more bitter taste than filtered water, which is neutral.
3.
1. I found it really interesting that you can make a pH indicator out of red cabbage and boiling water. I also found it interesting that different types of fish can live in different pH levels of water, I didnt even think about water having different pH levels.
ReplyDelete2. I tested orange and apple juice. The pH levels for these were 4 and about 2.5. I was not very surprised about the orange juice because I had already known that it would be acidic becasue of the citric acid. Although, I was somewhat surprised by the apple juice becuase I dont really think of apple juice being acidic, much less being more acidic than orange juice.
Katie Coats period 4
1. I found it interesting that pool water at the YMCA is tested hourly to make sure that the pH levels are normal and safe. I did not know that pH levels were used so oftenly in every day life. I also thought it was interesing to learn that human blood is neutral. I thought that blood would be acidic to breakdown food and more thing.
ReplyDelete2. I tested the pH values of diet coke and perfume. The pH level of the diet coke is 6, which is a little bit acidic. I thought that diet coke would be more acidic, like a 3 or 4. The perfume is a 4, which is moderatley acidic. I thought that perfume would be more basic because it goes it to your skin so i was surprised to learn that it was so acidic.
1. I thought that it was interesting that the liquid left from boiling red cabbage can be used as an indicator.
ReplyDelete2. I tested olive oil and mustard. The pH of olive oil was 5 and the pH of mustard was 3. I was a little suprised that olive oil was acidic because i would not have guessed that.
-Ian Rigg P.3
1) I found it interesting that our organs mantain the Ph level of our blood. Im curious to know what would happen if our organs failed to do this. I already knew that people had to check PH levels of aquariums and pools but I did not know why and it was interesting to know that you need a certain pH level to be safe for people and fish.
ReplyDelete2)I tested Perfume which was about 1 which is pretty acidic and Bactine, which is a disinfectant and it's pH level was about 4 so it was acidic but not as acidic as the perfume was. I assumed that both perfume and Bactine would be acidic as they are both highly concentrated.
1. I found it interesting that pool water was kept between 7-7.5 on the pH scale. I always assumed water must be very acidic or basic to kill bacteria and other microorganisms and am now curious as to how pool water really does that. I also, like almost every other student, found it interesting that a solution created from red cabbage can be used as a pH indicator but I actually already new that from the book.
ReplyDelete2. I first tested the pH level of coffee and found that it had a pH level of 7. This surprised me, because the coffee I tested had a very bitter taste. I then tested Country Time Lemonade and found it to have a pH of 2. This surprised me a lot because the lemonade was diluted with a lot of water and it was not very sour at all. I expected real lemon juice to have this pH level, but not lemonade.
Jacob Morrison
Period 4 Chemistry
1) I found it was interesting that you can make an indicator from red cabbage, and that your kidneys and lungs help regulate the pH level of your blood. Weird..
ReplyDelete2) I tested the water from my sink. The pH of it was 10 which is surprising and also a little concerning. I also tested my eye makeup remover. The pH of it was 4 and I expected it to be more acidic.
1. I thought it was interesting that the kidney and lungs regulate the pH in the body. And that the human body has neutral blood, I thought maybe blood would be a base since it tastes bitter and it's kinda slippery if you think about it.
ReplyDelete2. I tested water and I wasn't surprised to see that it was just above neutral (8). I also tested Saliva and it was a 4, which a little more acidic then I thought but makes sense to me since saliva helps break down food, (before stomach acid).
I found it interesting that when acids and bases react, it forms salt and water.
ReplyDeleteI tested orange juice and pineapple juice. The orange juice had a pH of 4 and the pineapple juice had a pH of three. Neither if these surprised me. They were exactly what I expected.
- Andy Prolman
Period 1
1. I thought that it was awesome that you can make an idicator from a red cabbage! Now I'm a little afraid to eat cabbage.
ReplyDelete2. I tested the cold water that comes out of my refrigerator and got a pH of 7, which means I can keep drinking it. I also tested my own sweat after exercising, and got a pH of 5! It was awesome.
1. Though you already told us you could make a pH indicator with red cabbage it was cool to see it in the video and go more into detail with it! And that you can identify bases or acids with something neutral. And that your kidneys and lungs help with the regulation of pH levels in your body.
ReplyDelete2. I tested the pH levels of Coke which had a pH level of three, and perfume which had a pH level of about 1.5. I expected about these answers for both of them.
1. I found it very interesting that you can make a pH indicator from red cabbage. It just shows that you can take every day items and turn them into something useful so easily. I also didn't know that your kidneys helped the regulation of your body's pH levels.
ReplyDelete2. I first tested the pH of water and it showed up to be about 8 on the pH scale which didn't surprised me. I also tried testing syrup and was surprised that it was a 4. I didn't think it would be that acidic.
-Nick Hoffman
1. I was surprised that bases were corrosive like acids, I never knew that. Also, I was interested that such a common and natural ingredient such as cabbage could be used to indicate pH.
ReplyDelete2. First, I tested the pH of my green tea. I assumed it would be a pH level of 7, since it was made with water. However, it was an acidity of 4, which surprised me. Next, I tested the acidity of my coffee. I predicted it would be a level of about 4 or 5, which turned out to be correct.
1. Something I found interesting in the video was that the blood in our bodies are very close to being neutral. Also I didn't know that red cabbage could be used as an indicator to determine if a solution was acidic or basic.
ReplyDelete2. The pH of the solutions that I tested were sparkling water, which was acidic at 2, and coffee creamer(Coffee Mate)which was basic at about an 8. The outcome wasn't very surprising, but interesting to find out!
1. I thought the part about pool water needing to have a pH level around 7 was interesting I had always assumed that pool water was just naturally acidic because of the chlorine.
ReplyDelete2. I decided to test the protien shake I drink every day and it turned out to be an acid with a pH around 4. I also tested samuel adams beer and it had a pH of about 2. I was surprised to find out my protien shake was an acid it made me think.
James Lewis
ReplyDeleteper.3
1)I found the part about aquariums interesting. Mainly because at my house we have a salt and fresh water aquarium. I found it interesting salt water fishes like a higher Ph the fresh water fish. I asked my mom about this, and found out that she tests the tanks for Ph once a week, to make sure the levels are where the fishes like.
2) To stay on the same theme i tested the Ph of the salt and freshwater tanks. The salt was at 8 and the fresh was at 6.5. This did not surprise me because that is where they should be, and my mom treats the tanks like there her kids. =)
2. i tested both agave nectar and canola oil. The agave was around a 2 or a 3 making it an acid. and the canola oil was around a 1 or 2 also making it an acid. i was not surprised by these results a lot of fruits are acidic
ReplyDeleteJon Zhang P3.
ReplyDelete1. I thought it was interesting that water could have a pH from 6.5-8.5, i always just thought it was plain and neutral.
2. I first tested a acne treating thing i had in my house. It has a pH of one, making it an acid, and i am not surprised because after reading the ingredients, i found out that it containted 2% Salicylic Acid.
I also tested my saliva. It has a pH of about 7 making it a base. I was surprised, because i know that saliva has many enzymes and I always assumed that Saliva was acidic.
1) something that was interesting for me was that water could have a pH from 6.5-8.5, i just considered it to be neutral all the time.
ReplyDelete2)i tested the pH of water, which was a 7 & Windex, which was a 9.
-p.1
elisabeth cashman
1. I found it interesting that water could range from 6.5 to 8.5 pH. Is that water in its natural state or is the range due to additives?
ReplyDelete2. At first, I tested the water from a plastic bottle that was sitting near a window overnight and during the time I was in school. The pH was approximately 8, while not alarming, I was curious what was in the water that could effect the pH level. With my second strip of pH paper, I added laundry detergent to the rest of the water left in the bottle. The piece of pH paper turned a vibrant blue, and, compared to the scale, it was closest to 11. Again, not surprising, but amusing to watch the color change from yellow to blue in seconds.
Safa Mahzari
Period 1
1. I thought this video was very interesting and purposeful. I found it fascinating that compared to pure water, tap water is not neutral most of the time. I thought this was interesting because this proves that the water we drink daily is not very clean. Secondly, I thought it was interesting that red cabbage is used as an indicator. Lastly, I was shocked when I discovered that my blood is neutral...I would think it would be a base.
ReplyDelete2. I found the pH of two things; pepsi (pH-2)& Grapefruit juice (pH-3). I was not suprised about the pH of the GF juice however I didnt think Pepsi was that acidic!