Unit 3 Target 3: 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

Option 3

Option 4

3. If a solution has 420,000 OH- at a pH of 8, how many OH- would there be at a pH of 9?

4,200

42,000,000

4,200,000

42,000

420

4. If a solution has 455,000 H+ at at pH of 3, how many H+ would there be at a pH of 5?

455

4,550

45,500,000

4,550,000

45,500

5. 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)

6. If a solution has 9,700 H+ at a pH of 8, how many H+ would there be at a pH of 5?

970

9.70

97,000

970,000

9,700,000

7. 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.

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.