$$\text{pH} + \text{pOH} = 14$$

$$[\mathrm{H}_3\mathrm{O}^+] = 1 \times 10$$^{-4}$$\ \mathrm{M}$$

$$[\mathrm{OH}^-] = 1 \times 10$$^{-5}$$\ \mathrm{M}$$

$$[\mathrm{H}_3\mathrm{O}^+] = 1 \times 10$$^{-2}$$\ \mathrm{M}$$

Question 1

Which of the following statements best describes the relationship between pH and pOH at 25°C?

Accepted Answer

$$	ext{pH} + 	ext{pOH} = 14$$

Question 2

A solution has a pH of 3. What is its pOH at 25°C?

Accepted Answer

$$	ext{pOH} = 11$$

Question 3

Which of the following substances is most basic according to the pH scale shown in the images?

Accepted Answer

1 M sodium hydroxide (NaOH)

Question 4

If a solution has a pOH of 2, what is its pH at 25°C?

Accepted Answer

$$	ext{pH} = 12$$

Question 5

Which of the following best describes a solution with a pH of 6?

Accepted Answer

Weakly acidic

Question 6

What is the [H$$_3O$^+$$] concentration of a solution with pH = 4?

Accepted Answer

$$[\mathrm{H}_3\mathrm{O}^+] = 1 	imes 10$$^{-4}$$\ \mathrm{M}$$

Question 7

Which of the following household substances is closest to neutral pH?

Accepted Answer

Pure water

Question 8

A solution has a pOH of 5. What is the [OH$$^-$$] concentration?

Accepted Answer

$$[\mathrm{OH}^-] = 1 	imes 10$$^{-5}$$\ \mathrm{M}$$

Question 9

Which of the following best describes the pH and pOH of a 1 M HCl solution?

Accepted Answer

Question 10

If a solution has a pH of 9, which of the following statements is true?

Accepted Answer

The solution is basic.

Question 11

Which of the following is true for a solution with [H$$_3O$^+$$] = [OH$$^-$$] at 25°C?

Accepted Answer

The solution is neutral.

Question 12

Which of the following best describes the pH and pOH of a solution of household ammonia?

Accepted Answer

pH \u003e 7, pOH \u003c 7

Question 13

A solution has a pH of 2. What is the [H$$_3O$^+$$] concentration?

Accepted Answer

$$[\mathrm{H}_3\mathrm{O}^+] = 1 	imes 10$$^{-2}$$\ \mathrm{M}$$

Question 14

Which of the following best describes the effect of increasing [H$$_3O$^+$$] in a solution?

Accepted Answer

The pH decreases.

Question 15

If a solution has a pOH of 8, what is its pH at 25°C?

Accepted Answer

$$	ext{pH} = 6$$

Acids and Bases: Properties, Definitions, Equilibria, and pH Calculations

Study Guide - Practice Questions