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

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