$$1.0 \times 10$$^{-2}$$\ \mathrm{M}$$

$$1.0 \times 10$$^{-2}$$\ \mathrm{M}$$

$$1.0 \times 10$$^{-11}$$\ \mathrm{M}$$

Question 1

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

Accepted Answer

pH + pOH = 14.00

Question 2

A solution has a pH of 3.0. What is its pOH at 25°C?

Accepted Answer

$$\mathrm{pOH} = 11.0$$

Question 3

Which of the following substances would you expect to have the lowest pH based on the provided diagrams?

Accepted Answer

1 M hydrochloric acid (HCl)

Question 4

If a solution has $$[\mathrm{H_3O^+}] = 1.0 	imes 10$$^{-12}$$\ \mathrm{M}$$, what is its pH?

Accepted Answer

$$\mathrm{pH} = 12.0$$

Question 5

Which of the following best describes a solution with pH = 9.0?

Accepted Answer

Weakly basic

Question 6

A student adds 1 M NaOH to water. What happens to the pH and pOH of the solution?

Accepted Answer

pH increases, pOH decreases

Question 7

Which of the following is true for a neutral solution at 25°C?

Accepted Answer

$$[\mathrm{H_3O^+}] = [\mathrm{OH^-}]$$

Question 8

If the pOH of a solution is 2.0, what is the $$[\mathrm{OH^-}]$$ concentration?

Accepted Answer

$$1.0 	imes 10$$^{-2}$$\ \mathrm{M}$$

Question 9

A solution of black coffee has a pH of about 5.0. Which of the following best describes its acidity?

Accepted Answer

Weakly acidic

Question 10

Which of the following equations correctly relates pH and $$[\mathrm{H_3O^+}]$$?

Accepted Answer

$$\mathrm{pH} = -\log [\mathrm{H_3O^+}]$$

Question 11

If a solution has a pH of 2.0, what is the $$[\mathrm{H_3O^+}]$$?

Accepted Answer

$$1.0 	imes 10$$^{-2}$$\ \mathrm{M}$$

Question 12

Which of the following household substances is most likely to have a pOH of 3?

Accepted Answer

Household ammonia

Question 13

A solution has $$[\mathrm{OH^-}] = 1.0 	imes 10$$^{-5}$$\ \mathrm{M}. $$What is its pOH?

Accepted Answer

$$\mathrm{pOH} = 5.0$$

Question 14

Which of the following best describes the taste and litmus test result for a typical base?

Accepted Answer

Bitter taste, turns litmus paper blue

Question 15

If a solution has a pH of 7.0 at 25°C, which of the following is true?

Accepted Answer

The solution is neutral

Question 16

Which of the following is the correct formula for calculating pOH from $$[\mathrm{OH^-}]$$?

Accepted Answer

$$\mathrm{pOH} = -\log [\mathrm{OH^-}]$$

Question 17

A solution has a pH of 11.0. Which of the following best describes its $$[\mathrm{H_3O^+}]$$ concentration?

Accepted Answer

$$1.0 	imes 10$$^{-11}$$\ \mathrm{M}$$

Question 18

Which of the following best describes the effect of adding a strong acid to pure water?

Accepted Answer

pH decreases, pOH increases

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

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