$$ 1.33 \times 10$$^{-10}$$ \ \mathrm{M} $$

Question 1

Which property is characteristic of acids, as described in the study materials?

Accepted Answer

They taste sour and turn blue litmus paper red.

Question 2

Which equation represents the self-ionization of water?

Accepted Answer

$$ \mathrm{H_2O} + \mathrm{H_2O} \rightarrow \mathrm{H_3O^+} + \mathrm{OH^-} $$

Question 3

A solution has $$ [\mathrm{H_3O^+}] = 1.0 	imes 10$$^{-7}$$ \ \mathrm{M} . $$What is the pH of this solution?

Accepted Answer

$$ \mathrm{pH} = 7 $$

Question 4

Which of the following is a strong acid?

Accepted Answer

Hydrochloric acid ($$ \mathrm{HCl} )$$

Question 5

What is the net ionic equation for the neutralization reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

$$ \mathrm{H^+} + \mathrm{OH^-} \rightarrow \mathrm{H_2O} $$

Question 6

If 10.00 mL of an HCl solution requires 12.54 mL of 0.100 M NaOH to reach the equivalence point, what is the concentration of the HCl solution?

Accepted Answer

$$ 0.125 \ \mathrm{M} $$

Question 7

Which of the following statements about strong and weak acids is correct?

Accepted Answer

Strong acids completely ionize in water.

Question 8

What is the Arrhenius definition of a base?

Accepted Answer

A base produces $$ \mathrm{OH^-} $$ ions in aqueous solution.

Question 9

Which of the following is an example of a buffer system?

Accepted Answer

A mixture of acetic acid and sodium acetate.

Question 10

What is the ion product constant for water ($$ K_w ) at 25$$°C?

Accepted Answer

$$ 1.0 	imes 10$$^{-14}$$ $$

Question 11

Which of the following best describes the Brønsted–Lowry definition of acids and bases?

Accepted Answer

Acids are proton donors and bases are proton acceptors.

Question 12

Which of the following is a real-world consequence of acid rain?

Accepted Answer

It dissolves metals and damages building materials.

Question 13

A solution has $$ [\mathrm{H_3O^+}] = 7.5 	imes 10$$^{-5}$$ \ \mathrm{M} . $$What is $$ [\mathrm{OH^-}]  in $$this solution at 25°C?

Accepted Answer

$$ 1.33 	imes 10$$^{-10}$$ \ \mathrm{M} $$

Question 14

Which of the following statements about buffers is correct?

Accepted Answer

Buffers resist changes in pH by neutralizing added acids and bases.

Question 15

Which of the following is an amphoteric substance?

Accepted Answer

Water ($$ \mathrm{H_2O} )$$

Question 16

What is the pH of a solution with $$ [\mathrm{H_3O^+}] = 1.8 	imes 10$$^{-4}$$ \ \mathrm{M} $$?

Accepted Answer

$$ 4.74 $$

Question 17

Which of the following is a typical use of sulfuric acid in industry?

Accepted Answer

In the manufacture of fertilizers, explosives, dyes, and glue.

Question 18

What happens when aluminum reacts with hydrochloric acid?

Accepted Answer

Aluminum dissolves, producing hydrogen gas and a dissolved salt.

Question 19

Which of the following best describes the danger of ethylene glycol poisoning?

Accepted Answer

It overwhelms the blood’s natural buffering system, causing blood pH to drop.

Acids and Bases: Properties, Reactions, and Quantitative Analysis

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