Question 1

Which of the following best explains why the light bulb glows brightly when the beaker contains a solution of NaCl, as shown in the first image?

Accepted Answer

NaCl dissociates completely in water, producing ions that carry electric current.

Question 2

According to the solubility rules provided, which compound is insoluble in water?

Accepted Answer

AgCl

Question 3

Which of the following is a correct net ionic equation for the reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

$$ \mathrm{H^+ (aq) + OH^- (aq) \rightarrow H_2O (l)} $$

Question 4

Which of the following acids is classified as a weak acid?

Accepted Answer

HF

Question 5

What is the molecular equation for the reaction between zinc chloride and sodium sulfide in water?

Accepted Answer

$$ \mathrm{ZnCl_2 (aq) + Na_2S (aq) \rightarrow ZnS (s) + 2NaCl (aq)} $$

Question 6

Which of the following best describes a strong electrolyte?

Accepted Answer

A substance that completely ionizes in water.

Question 7

Which of the following is the correct net ionic equation for the reaction of barium carbonate with nitric acid?

Accepted Answer

$$ \mathrm{BaCO_3 (s) + 2H^+ (aq) \rightarrow CO_2 (g) + H_2O (l) + Ba^{2+} (aq)} $$

Question 8

Which of the following best describes the difference between the two beakers shown in the images with HCl and HF?

Accepted Answer

HCl solution contains mostly ions, while HF solution contains mostly molecules.

Question 9

Which of the following is a correct net ionic equation for the reaction of ammonium chloride with sodium hydroxide?

Accepted Answer

$$ \mathrm{NH_4^+ (aq) + OH^- (aq) \rightarrow NH_3 (g) + H_2O (l)} $$

Question 10

Which of the following compounds will NOT form a precipitate when mixed with a solution of Na2SO4?

Accepted Answer

KCl

Question 11

Which of the following is the correct net ionic equation for the reaction between potassium sulfide and hydrochloric acid?

Accepted Answer

$$ \mathrm{S^{2-} (aq) + 2H^+ (aq) \rightarrow H_2S (g)} $$

Question 12

Which of the following statements is TRUE regarding the reaction between CaSO3 and H2SO4?

Accepted Answer

SO2 gas is produced.

Question 13

Which of the following is a strong base?

Accepted Answer

Ba(OH)2

Question 14

Which of the following best describes a precipitation reaction?

Accepted Answer

A reaction in which a solid forms from two aqueous solutions.

Question 15

Which of the following is the correct net ionic equation for the reaction of calcium sulfide with hydrobromic acid?

Accepted Answer

$$ \mathrm{CaS (s) + 2H^+ (aq) \rightarrow Ca^{2+} (aq) + H_2S (g)} $$

Question 16

Which of the following is a correct net ionic equation for the reaction between acetic acid and sodium hydroxide?

Accepted Answer

$$ \mathrm{HC_2H_3O_2 (aq) + OH^- (aq) \rightarrow C_2H_3O_2^- (aq) + H_2O (l)} $$

General Chemistry: Precipitation, Acid-Base, and Gas-Forming Reactions Study Guide

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