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

Question 1

Which of the following statements best describes the Arrhenius definition of an acid?

Accepted Answer

An acid produces H$$^{+}$$ ions in aqueous solution.

Question 2

A student tastes a Sour Patch Kid and experiences a sour flavor. Which chemical process is responsible for this sensation?

Accepted Answer

The acids in the candy produce H$$^{+}$$ ions that react with proteins on the tongue.

Question 3

Which of the following is NOT a property of acids?

Accepted Answer

Acids feel slippery.

Question 4

Hydrochloric acid (HCl) is used in industry to clean metals and is also found in the human stomach. What is its primary function in the stomach?

Accepted Answer

To break down food and kill harmful bacteria.

Question 5

Which acid is the most widely produced chemical in the United States and is used in automobile batteries?

Accepted Answer

Sulfuric acid (H$$_2SO$_4)$$

Question 6

Which functional group is characteristic of carboxylic acids?

Accepted Answer

COOH

Question 7

Bases are commonly found in household cleaning products. Which property of bases explains why they feel slippery?

Accepted Answer

Bases react with oils on skin to form soap-like substances.

Question 8

According to the Brønsted–Lowry definition, which statement is correct?

Accepted Answer

An acid is a proton donor and a base is a proton acceptor.

Question 9

Which of the following reactions is an example of a neutralization reaction?

Accepted Answer

$$\mathrm{HCl(aq) + NaOH(aq) \rightarrow H_2O(l) + NaCl(aq)}$$

Question 10

A solution contains 0.025 M Sr(OH)$$_2. $$What is the concentration of OH$$^{-}$$ ions?

Accepted Answer

$$0.050\ \mathrm{M}$$

Question 11

Which of the following statements about water is TRUE?

Accepted Answer

Water is amphoteric; it can act as either an acid or a base.

Question 12

At 25°C, what is the value of the ion product constant for water ($$K_w$$)?

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

Which of the following acids is a strong acid?

Accepted Answer

Hydrochloric acid (HCl)

Question 15

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

Accepted Answer

pH = 4.74

Question 16

Which of the following best describes a buffer solution?

Accepted Answer

A solution that contains significant amounts of both a weak acid and its conjugate base.

Question 17

Ethylene glycol poisoning leads to a drop in blood pH. Why is this dangerous?

Accepted Answer

Low blood pH overwhelms the blood’s natural buffering system, reducing oxygen transport.

Question 18

Acid rain is primarily caused by which chemical reactions?

Accepted Answer

Sulfur oxides and nitrogen oxides reacting with water to form sulfuric acid and nitric acid.

Question 19

A titration experiment uses 12.54 mL of 0.100 M NaOH to neutralize 10.00 mL of HCl. What is the concentration of the HCl solution?

Accepted Answer

$$0.125\ \mathrm{M}$$

Acids and Bases: Properties, Definitions, and Reactions

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