Lab: Measuring pH

Question 1

Scenario: You are testing two different household solutions with your cabbage indicator, using the color key to the right.One solution turns blue. A possible hydrogen ion concentration for this solution is:

Revolt · Accepted Answer

1 × 10-8 M

Question 2

Scenario: You are testing two different household solutions with your cabbage indicator, using the color key to the right.The second solution turns purple. A possible hydrogen ion concentration for this solution is:

Revolt · Accepted Answer

1 × 10-7 M

Question 3

Identify the approximate color you would expect if you were to test each household item using a cabbage pH indicator.

Revolt · Accepted Answer

coffee, pH 5: purple; baking soda solution, pH 9: blue; bleach, pH 13 (strong base): green; toothpaste, pH 8: blue; milk, pH 6.8: purple; battery acid, pH 1, (strong acid): red

Question 4

How many acids are shown? How many bases are shown?

Revolt · Accepted Answer

3

Question 5

[___] coffee, pH 5

Revolt · Accepted Answer

purple; Selection 1: purple; Selection 2: blue; Selection 3: green; Selection 4: blue; Selection 5: purple; Selection 6: red

Question 6

redblue✔ purple

Revolt · Accepted Answer

purple; Selection 1: purple; Selection 2: blue; Selection 3: green; Selection 4: blue; Selection 5: purple; Selection 6: red

Question 7

Which factors might cause the pH of the water to change? Check all that apply.

Revolt · Accepted Answer

rain; temperature change

Question 8

red✔ bluegreen

Revolt · Accepted Answer

blue

Question 9

pinkblue✔ green

Revolt · Accepted Answer

green

Question 10

pink✔ bluegreen

Revolt · Accepted Answer

blue

Lab: Measuring pH Answers

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