Unit 3 Target 2: pH Quiz

1. Netural solutions have a pH of

0

7

9

14

2. Which is true?

PH of less than 7 is basic; pH of more than 7 is acidic

PH of less than 7 is acidic; pH of more than 7 is basic

3. Which of the following statements is true concerning acids and bases?

Acids and bases don't react with each other

Acids mixed with bases neutralize each other

Acids mixed with bases make stronger bases

Acids mixed with bases make stronger acids

4. Which solution has the greatest concentration of hydroxide ions (OH-)?

Urine (pH 6.0)

Rainwater (pH 5.5)

Tomato juice (pH 4.0)

Gastric juice (pH 2.0)

5. If a solution has 640,000 OH- at a pH of 8, how many OH- would there be at a pH of 9?

6,400

64,000,000

6,400,000

64,000

640

6. As part of an experiment, a student adds 10 mL of 5% hydrochloric acid solution to 100 mL of a non-buffered, colorless solution of sugar. What is the most likely result?

The concentration of hydroxide ions (OH-) will increase.

The concentration of hydrogen ions (H+) will increase.

The pH will not change.

The pH will increase.

7. Which is the correct set of acid properties?

Sour taste, corrosive, change litmus from red to blue

Sour taste, corrosive, change litmus from blue to red

Sweet taste, slippery, change litmus from blue to red

Sour taste, slippery, change litmus from blue to red

8. When the pH in a stomach increases from 2 to 4, how does the hydrogen ion concentration change?

It increases by a factor of 2.

It increases by a factor of 100.

It decreases by a factor of 2.

It decreases by a factor of 100.

9. If a solution has 345,000 H+ at a pH of 3, how many H+ would there be at a pH of 5?

345

3,450

34,500,000

3,450,000

34,500

10. If a solution has 2,800 H+ at a pH of 8, how many H+ would there be at a pH of 5?

280

2.80

28,000

280,000

2,800,000