pH of Household Liquids FINAL

7/28/2019 pH of Household Liquids FINAL

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S.I.P

By: Eli and TallyPlease note; pictures used were not from our

experiment, they were clip art and Googleimages


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Testable Question

What household liquid is the most

acidic?

Hypothesis

If the pH is tested, then vinegar will be the

most acidic household liquid, because it is

sour and can clean dirt off of things. This

means it is probably acidic.


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What is pH?

PH was introduced by a Danish chemist, Sren Peder Lauritz Srensen in 1909.Srensen never said what pH stood for so there is still dispute of what it means. Some

guesses are power of hydrogen and potential hydrogen. In chemistry pH is the

measure of activity in the hydrogen ion. On the pH scale 7.0 is neutral, distilled water

has a pH of 7.0. Things with a pH less than 7.0 is acidic and things with a pH greater

are base or alkaline.

This is the decimal logarithm for pH.

Some natural pH indicators are hibiscus plant, red cabbage and red wine.


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Purpose of Our Experiment

The purpose of our experiment was to find out

what was the most acidic household liquid.

InspirationOur parents had told us that Coke was very acidic. One of

our fathers said that in high school he had left a nail in a cup

of Coke overnight, and when he had checked the nextday the nail was half the size it had been before. We

decided to see if this was true because he sometimes

makes stuff up (dont tell him I told you this). We were about

to do the experiment when the amazing Eli suggested Why

just use Coke? Why not use other household liquids?

Thus, an idea was born


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Variables

Variables

Temperature

Type of pH strip used

Material liquid is stored in

Size/shape of container liquid is stored in

How clean the container is (If the container hassome lemon juice inside in could affect theexperiment)

Independent Variable The independent variable is the liquid that is being

tested.


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To do the experiment you will need.

pH strips with a range of at least 4.5 to9.0

two large paper towels

vinegar, Coke, Orangina, milk,water, soy milk, Fat Tire, and olive oil

eight identical store-bought ceramic cups

pencil and notebook paper and tape

timer


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Directions

1. Gather materials

2. Pour [a] liquid into a cup


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More Directions

3. Set timer to 45 seconds

4. Place PH strip in liquid and start timer


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Even More Directions

5. When timer beeps, take out pH strip

6. Lay on paper towel for fifteen seconds

7. Compare with pH chart when dry


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Even, even more directions

8. Repeat process two more times for

validity.

9. Repeat steps 1-8 for all liquids.


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Results

Orangina Vinegar Olive oil Water Coconut water Pepsi Milk Beer Soy milk

4.75 4 5.5 6.5 5.25 4.5 6.5 5 7.25

4.75 4 5.5 6.75 5.25 4.5 6.5 5 7.25

4.75 4 5.5 6.75 5.25 4.5 6.5 5 7.25

4.75 4 5.5 6.7 5.25 4.5 6.5 5 7.25

0

1

2

3

4

5

6

7

8

Pepsi

Milk

Orangina

Vinegar

Olive oil

Water

Coconut

Water Beer

Soy milk As you can see,

vinegar had the

lowest pH

meaning its the

most acidic, and

soymilk had the

highest meaning

its the most

base.


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Observations We noticed that the litmus paper we were using

wasn't accurate, so we bought new ones.

We also noticed that we had to keep the pH stripsin for 45 seconds instead of the suggested 15. If

we kept them in in the cup for not enough time thestrips wouldnt change that much, but if we keptthem in for 45 seconds the strips would actuallychange.

The soy sauce covered the strips so we couldntsee the pH; we marked that as inconclusive.

When we were testing the beer it had a chemicalreaction and fizzed a lot.


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Our hypothesis was that if pH was tested for the liquids, vinegar

would be the most acidic because vinegar can clean dirt and grime

off of things which means its probably acidic

Our hypothesis was proved because vinegar had the lowest pH of

all the liquids

Some problems we encountered was that the litmus paper we were

originally using wasnt very good so we had to buy new ones

Our experiment couldve been improved if the pH chart we were

using was more specific

Two follow up questions:1. Why did the pH strips and the beer have a reaction?

2. Would the results differ if we used different strip brands?


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Experiment in Nutshell

We proved our hypothesis

We fixed some problems

We found the acidity of household liquids

We found that Coke was indeed acidic We discovered that some pH strips will react with Fat

Tire beer

Our findings correlate with the fact many people believe

that vinegar is very acidic.


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THE END


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This publication was created by Eli and Tally. No part of

this publication may be reproduced without permission

under federal law. Reproducing this article without

permission can result in a fine of up to 25.

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pH of Household Liquids FINAL