Question 1

Which of the following observations is NOT typically considered evidence for a chemical reaction?

Accepted Answer

Evaporation of solvent

Question 2

Which of the following is the correct net ionic equation for the reaction between aqueous solutions of sodium chloride and silver nitrate?

Accepted Answer

$$\mathrm{Ag^+(aq) + Cl^-(aq) \rightarrow AgCl(s)}$$

Question 3

A student mixes aqueous solutions of barium nitrate and sodium sulfate. A white precipitate forms. Which compound is most likely the precipitate?

Accepted Answer

$$\mathrm{$$BaSO_4$$}$$

Question 4

Which of the following best describes a spectator ion in a chemical reaction?

Accepted Answer

An ion that is present in the same form on both sides of the equation

Question 5

Which of the following reactions is an example of a gas formation reaction?

Accepted Answer

$$\mathrm{2HCl(aq) + $$CaCO_3$$(s) \rightarrow $$CaCl_2$$(aq) + H_2O(l) + CO_2$(g)}$$

Question 6

Which of the following statements about the solubility of ionic compounds is supported by the experiment described in the study materials?

Accepted Answer

All compounds containing Group 1A cations are soluble.

Question 7

A student adds 6 M HCl to solid magnesium hydroxide and observes that the solid dissolves. Which net ionic equation best represents this reaction?

Accepted Answer

$$\mathrm{2H^+(aq) + Mg(OH)_2(s) \rightarrow Mg$$^{2+}$$(aq) + 2H_2O(l)}$$

Question 8

Which of the following metals will NOT react with hydrochloric acid to produce hydrogen gas, based on the activity series provided?

Accepted Answer

Copper

Question 9

A solution contains an unknown sodium compound. When barium nitrate is added, a white precipitate forms. When magnesium nitrate is added, no precipitate forms. Which is the most likely identity of the unknown compound?

Accepted Answer

$$\mathrm{Na_2SO_4}$$

Question 10

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

Accepted Answer

$$\mathrm{2H^+(aq) + $$CaCO_3$$(s) \rightarrow Ca$$^{2+}$$(aq) + H_2O(l) + CO_2$(g)}$$

Question 11

Which of the following best explains why a precipitate forms when aqueous ammonia is added to a solution of magnesium nitrate, but not when added to sodium nitrate?

Accepted Answer

Magnesium hydroxide is insoluble, while sodium hydroxide is soluble.

Question 12

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

Accepted Answer

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

Question 13

Which of the following combinations will NOT result in the formation of a precipitate?

Accepted Answer

$$\mathrm{$$NaNO_3$$(aq) + NaCl(aq)}$$

Question 14

Which of the following best describes a metathesis (double displacement) reaction?

Accepted Answer

A reaction in which the cations and anions of two compounds exchange partners

Question 15

Which of the following is a correct statement about the activity series and single replacement reactions?

Accepted Answer

A metal higher than hydrogen in the activity series will displace hydrogen from acid.

Question 16

Which of the following best explains why no gas is formed when hydrochloric acid is added to sodium sulfate, but gas is formed when added to sodium carbonate?

Accepted Answer

Sulfate does not react with acid to form a gaseous product, but carbonate does.

Question 17

Which of the following is the correct molecular equation for the reaction between zinc metal and hydrochloric acid?

Accepted Answer

$$\mathrm{Zn(s) + 2HCl(aq) \rightarrow $$ZnCl_2$$(aq) + H_2$(g)}$$

Question 18

Which of the following best describes the solubility of compounds containing the hydroxide ion, based on the experiment?

Accepted Answer

Hydroxides of Group 1A cations are soluble, but most other hydroxides are insoluble.

Types of Chemical Reactions, Ionic Equations, and Solubility Rules: Laboratory Study Guide

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