Question 1

Which of the following compounds is expected to be insoluble in water, based on the solubility rules provided in Table 9.3?

Accepted Answer

BaCO3

Question 2

Which of the following ions is a spectator ion in the reaction: $$\mathrm{$$AgNO_3$$(aq) + NaCl(aq) \rightarrow AgCl(s) + $$NaNO_3$$(aq)}$$?

Accepted Answer

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

Question 3

Which of the following best describes the Lewis structure for $$\mathrm{$$NCl_3$$}$$?

Accepted Answer

A nitrogen atom single-bonded to three chlorine atoms, with each chlorine having three lone pairs and nitrogen having one lone pair.

Question 4

A solution is prepared by dissolving 10.0 g of $$\mathrm{Na_2SO_4} in $$enough water to make 500.0 mL of solution. What is the molarity of sodium ions in the solution?

Accepted Answer

$$0.282\ \mathrm{M}$$

Question 5

Which of the following compounds will form a precipitate when mixed with a solution of $$\mathrm{Ba(NO_3$)_2}$$?

Accepted Answer

$$\mathrm{Na_2SO_4}$$

Question 6

Which of the following is the correct net ionic equation for the reaction between $$\mathrm{Na_2SO_4(aq)}$$ and $$\mathrm{$$BaCl_2$$(aq)}$$?

Accepted Answer

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

Question 7

A student mixes solutions of $$\mathrm{K_2CrO_4}$$ and $$\mathrm{$$AgNO_3$$}. $$What is the precipitate formed?

Accepted Answer

$$\mathrm{Ag_2CrO_4}$$

Question 8

Which of the following best explains why $$\mathrm{$$CaSO_4$$} is $$only slightly soluble in water?

Accepted Answer

Because calcium is an alkali earth metal and forms insoluble sulfates.

Question 9

Which of the following compounds is soluble in water according to Table 9.2?

Accepted Answer

$$\mathrm{Na_2CO_3}$$

Question 10

Which of the following best describes the difference between a molecular and an ionic compound?

Accepted Answer

Ionic compounds are composed of cations and anions, while molecular compounds are composed of nonmetals sharing electrons.

Question 11

Which of the following is the correct dissociation equation for $$\mathrm{K_2SO_4} in $$water?

Accepted Answer

$$\mathrm{K_2SO_4(aq) \rightarrow 2K^+(aq) + SO_4$^{2-}(aq)}$$

Question 12

Which of the following compounds is an exception to the insolubility of hydroxides, and is therefore soluble in water?

Accepted Answer

$$\mathrm{NaOH}$$

Question 13

A solution contains $$\mathrm{NH_4NO_3}. $$Which ions are present in the solution?

Accepted Answer

$$\mathrm{NH_4$^+}$$\ and\ $$\mathrm{NO_3$^-}$$

Question 14

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

Accepted Answer

Because silver chloride forms a strong ionic lattice that water cannot break apart.

Question 15

Which of the following compounds will NOT conduct electricity when dissolved in water?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} ($$glucose)

Question 16

Which of the following best describes the solubility of $$\mathrm{$$CaCO_3$$} in $$water?

Accepted Answer

It is insoluble except with alkali metals and ammonium.

Chem 101 Spring 2026 Mock Final Exam – Step-by-Step Study Guidance

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