Question 1

Which of the following compounds is expected to be insoluble in water according to the solubility rules provided?

$$\mathrm{A.\ Na_2SO_4}$$

$$\mathrm{B.\ AgCl}$$

$$\mathrm{C.\ $$KNO_3$$}$$

$$\mathrm{D.\ (NH_4$)_2CO_3}$$

Accepted Answer

$$\mathrm{AgCl}$$

Question 2

A student mixes solutions of $$\mathrm{NaCl}$$ and $$\mathrm{$$AgNO_3$$}. $$What precipitate, if any, will form?

$$\mathrm{A.\ $$NaNO_3$$}$$

$$\mathrm{B.\ AgCl}$$

$$\mathrm{C.\ NaAg}$$

$$\mathrm{D.\ No\ precipitate}$$

Accepted Answer

$$\mathrm{AgCl}$$

Question 3

Which of the following best explains why $$\mathrm{$$BaSO_4$$} is $$used in medical imaging despite containing toxic barium?

$$\mathrm{A.} It is $$highly soluble and quickly absorbed.

$$\mathrm{B.} It is $$insoluble and does not dissolve in the body.

$$\mathrm{C.} It $$reacts with stomach acid to form a harmless compound.

$$\mathrm{D.} It is $$neutralized by other medications.

Accepted Answer

It is insoluble and does not dissolve in the body.

Question 4

Which compound will NOT form a precipitate when mixed with a solution of $$\mathrm{Na_2SO_4}$$?

$$\mathrm{A.\ $$BaCl_2$$}$$

$$\mathrm{B.\ $$CaCl_2$$}$$

$$\mathrm{C.\ KCl}$$

$$\mathrm{D.\ Pb(NO_3$)_2}$$

Accepted Answer

$$\mathrm{KCl}$$

Question 5

Which of the following statements about the solubility of ionic compounds is correct?

$$\mathrm{A.}$$ All chlorides are soluble except those of $$\mathrm{Ag^+}$$, $$\mathrm{Pb$$^{2+}$$}$$, and $$\mathrm{Hg_2$^{2+}}$$.

$$\mathrm{B.}$$ All sulfates are insoluble.

$$\mathrm{C.}$$ All carbonates are soluble.

$$\mathrm{D.}$$ All hydroxides are soluble.

Accepted Answer

All chlorides are soluble except those of $$\mathrm{Ag^+}$$, $$\mathrm{Pb$$^{2+}$$}$$, and $$\mathrm{Hg_2$^{2+}}.$$

Question 6

A solution contains $$\mathrm{K_2CO_3}. $$Which of the following cations, when added as a soluble salt, will cause a precipitate to form?

$$\mathrm{A.\ Na^+}$$

$$\mathrm{B.\ Ca$$^{2+}$$}$$

$$\mathrm{C.\ NH_4$^+}$$

$$\mathrm{D.\ K^+}$$

Accepted Answer

$$\mathrm{Ca$$^{2+}$$}$$

Question 7

Which of the following compounds is soluble in water?

$$\mathrm{A.\ $$PbSO_4$$}$$

$$\mathrm{B.\ Na_2CO_3}$$

$$\mathrm{C.\ AgBr}$$

$$\mathrm{D.\ $$CaCO_3$$}$$

Accepted Answer

$$\mathrm{Na_2CO_3}$$

Question 8

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

$$\mathrm{A.\ $$NaNO_3$$}$$

$$\mathrm{B.\ NaCl}$$

$$\mathrm{C.\ $$KNO_3$$}$$

$$\mathrm{D.\ Na_2SO_4}$$

Accepted Answer

$$\mathrm{NaCl}$$

Question 9

Which of the following best describes the solubility of $$\mathrm{Mg(OH)_2} in $$water?

$$\mathrm{A.}$$ Soluble

$$\mathrm{B.}$$ Insoluble

$$\mathrm{C.}$$ Soluble only in acidic solution

$$\mathrm{D.}$$ Soluble only in basic solution

Accepted Answer

Insoluble

Question 10

A solution contains $$\mathrm{Ca$$^{2+}$$}$$ ions. Which anion, when added, will NOT form a precipitate?

$$\mathrm{A.\ SO_4$^{2-}}$$

$$\mathrm{B.\ CO_3$^{2-}}$$

$$\mathrm{C.\ NO_3$^-}$$

$$\mathrm{D.\ PO_4$^{3-}}$$

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 11

Which of the following is a correct net ionic equation for the precipitation of silver chloride from solutions of $$\mathrm{$$AgNO_3$$}$$ and $$\mathrm{NaCl}$$?

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

$$\mathrm{B.\ $$AgNO_3$$ (aq) + NaCl (aq) \rightarrow AgCl (s) + $$NaNO_3$$ (aq)}$$

$$\mathrm{C.\ Ag^+ (aq) + NO_3$^- (aq) + Na^+ (aq) + Cl^- (aq) \rightarrow AgCl (s) + Na^+ (aq) + NO_3$^- (aq)}$$

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

Accepted Answer

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

Question 12

Which of the following pairs will NOT produce a precipitate when mixed?

$$\mathrm{A.\ Na_2CO_3}$$ and $$\mathrm{$$CaCl_2$$}$$

$$\mathrm{B.\ $$KNO_3$$}$$ and $$\mathrm{$$AgNO_3$$}$$

$$\mathrm{C.\ Na_2SO_4}$$ and $$\mathrm{$$BaCl_2$$}$$

$$\mathrm{D.\ Pb(NO_3$)_2}$$ and $$\mathrm{Na_2SO_4}$$

Accepted Answer

$$\mathrm{$$KNO_3$$}$$ and $$\mathrm{$$AgNO_3$$}$$

Question 13

Which of the following best explains why $$\mathrm{Na_2SO_4} is $$soluble in water?

$$\mathrm{A.}$$ All sodium salts are soluble.

$$\mathrm{B.}$$ All sulfate salts are soluble.

$$\mathrm{C.}$$ All salts are soluble.

$$\mathrm{D.}$$ Sodium sulfate is an exception to the insolubility rule.

Accepted Answer

All sodium salts are soluble.

Question 14

A water sample is contaminated with $$\mathrm{Pb$$^{2+}$$}$$ ions. Which anion should be added to remove $$\mathrm{Pb$$^{2+}$$} as an $$insoluble salt?

$$\mathrm{A.\ NO_3$^-}$$

$$\mathrm{B.\ SO_4$^{2-}}$$

$$\mathrm{C.\ Na^+}$$

$$\mathrm{D.\ NH_4$^+}$$

Accepted Answer

$$\mathrm{SO_4$^{2-}}$$

Question 15

Which of the following compounds is insoluble in water?

$$\mathrm{A.\ K_2SO_4}$$

$$\mathrm{B.\ $$NaNO_3$$}$$

$$\mathrm{C.\ $$CaCO_3$$}$$

$$\mathrm{D.\ (NH_4$)_2SO_4}$$

Accepted Answer

$$\mathrm{$$CaCO_3$$}$$

Question 16

Which of the following best describes the solubility of $$\mathrm{NH_4Cl} in $$water?

$$\mathrm{A.}$$ Insoluble

$$\mathrm{B.}$$ Soluble

$$\mathrm{C.}$$ Soluble only in acidic solution

$$\mathrm{D.}$$ Soluble only in basic solution

Accepted Answer

Soluble

Solubility Rules and Classification of Ionic Compounds

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