Question 1

Which of the following best describes a soluble compound according to the solubility rules?

Accepted Answer

A compound that dissolves in water to form an aqueous solution.

Question 2

According to the solubility rules, which of the following compounds is insoluble in water?

Accepted Answer

$\mathrm{CaCO_3}$

Question 3

A student mixes solutions of $\mathrm{Na_2SO_4}$ and $\mathrm{BaCl_2}$. According to the solubility rules, what precipitate, if any, will form?

Accepted Answer

$\mathrm{BaSO_4}$

Question 4

Which of the following ions will always form soluble compounds, regardless of the anion present?

Accepted Answer

$\mathrm{NH_4^+}$

Question 5

Which compound will be insoluble in water according to the solubility rules?

Accepted Answer

$\mathrm{BaSO_4}$

Question 6

A solution contains $\mathrm{Pb(NO_3)_2}$ and $\mathrm{Na_2SO_4}$. What is the net ionic equation for the precipitation reaction that occurs?

Accepted Answer

$\mathrm{Pb^{2+} (aq) + SO_4^{2-} (aq) \rightarrow PbSO_4 (s)}$

Question 7

Which of the following best explains why $\mathrm{AgCl}$ is considered insoluble in water?

Accepted Answer

It forms a precipitate because the attraction between $\mathrm{Ag^+}$ and $\mathrm{Cl^-}$ is stronger than their attraction to water.

Question 8

Which of the following combinations will result in the formation of an insoluble compound?

Accepted Answer

$\mathrm{Na_2CO_3}$ + $\mathrm{CaCl_2}$

Question 9

Which of the following is an exception to the general rule that most sulfates are soluble?

Accepted Answer

$\mathrm{BaSO_4}$

Question 10

A hospital uses $\mathrm{NaCl}$ solutions for intravenous therapy. Why is $\mathrm{NaCl}$ chosen over $\mathrm{AgCl}$ for this purpose?

Accepted Answer

$\mathrm{NaCl}$ is soluble in water, while $\mathrm{AgCl}$ is not.

Question 11

Which of the following compounds will NOT form a precipitate when mixed with $\mathrm{Na_2SO_4}$?

Accepted Answer

$\mathrm{KCl}$

Question 12

Which compound is insoluble in water and would be found as a solid in a mixture?

Accepted Answer

$\mathrm{AgBr}$

Question 13

Which of the following best describes the role of CBS (Ca$^{2+}$, Ba$^{2+}$, Sr$^{2+}$) in the solubility rules?

Accepted Answer

They are exceptions that make certain compounds insoluble.

Question 14

A chemist wants to separate $\mathrm{Ag^+}$ ions from a solution. Which reagent should they add to form an insoluble precipitate?

Accepted Answer

$\mathrm{NaCl}$

Question 15

Which of the following compounds is soluble in water?

Accepted Answer

$\mathrm{Na_2CO_3}$

Question 16

Which of the following best explains why $\mathrm{NH_4NO_3}$ is used in cold packs?

Accepted Answer

It dissolves in water, absorbing heat and causing the pack to feel cold.

Question 17

Which of the following pairs will form a precipitate when mixed?

Accepted Answer

$\mathrm{AgNO_3}$ + $\mathrm{NaCl}$

Question 18

Which of the following is a correct net ionic equation for the formation of an insoluble sulfate?

Accepted Answer

$\mathrm{Ba^{2+} (aq) + SO_4^{2-} (aq) \rightarrow BaSO_4 (s)}$

Solubility Rules in Chemistry: Study Guide

Study Guide - Practice Questions