Question 1

Which of the following statements best describes a strong electrolyte in aqueous solution?

Accepted Answer

It completely dissociates into ions, producing a large number of ions in solution.

Question 2

Which of the following compounds is a nonelectrolyte when dissolved in water?

Accepted Answer

C2H5OH

Question 3

Given the reaction: $$\mathrm{$$AgNO_3$$(aq) + KCl(aq) \rightarrow AgCl(s) + $$KNO_3$$(aq)}$$, what is the net ionic equation?

Accepted Answer

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

Question 4

Which of the following is a weak acid?

Accepted Answer

HF

Question 5

What is the oxidation number of sulfur in $$\mathrm{H_2SO_4}$$?

Accepted Answer

+6

Question 6

Which of the following best describes the role of Zn in the reaction $$\mathrm{Zn(s) + 2H^+(aq) \rightarrow Zn$$^{2+}$$(aq) + H_2$(g)}$$?

Accepted Answer

Zn is oxidized and acts as the reducing agent.

Question 7

Calculate the molarity of a solution prepared by dissolving 25.0 g of NaOH (molar mass = 40.0 g/mol) in 325 mL of solution.

Accepted Answer

$$0.769\ \mathrm{M}$$

Question 8

Which of the following salts is soluble in water according to the solubility rules?

Accepted Answer

Na3PO4

Question 9

What is the correct balanced net ionic equation for the neutralization of HNO3 with NaOH?

Accepted Answer

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

Question 10

A solution is prepared by diluting 25.0 mL of 1.75 M KBr to a final volume of 65.0 mL. What is the final molarity?

Accepted Answer

$$0.673\ \mathrm{M}$$

Question 11

Which of the following is the correct dilution equation?

Accepted Answer

$$M_c V_c = M_d V_d$$

Question 12

How many grams of KBr (molar mass = 119.0 g/mol) are needed to prepare 225 mL of 0.400 M KBr solution?

Accepted Answer

10.7 g

Question 13

Which of the following is a weak base?

Accepted Answer

NH3

Question 14

What is the concentration of $$\mathrm{NO_3$^-}$$ ions in a 2.5 M solution of $$\mathrm{Ca(NO_3$)_2}$$?

Accepted Answer

5.0 M

Question 15

In the reaction $$\mathrm{3Pb(NO_3$)_2(aq) + 2FeI_3(aq) \rightarrow 3PbI_2(s) + 2Fe(NO_3$)_3(aq)}$$, if you mix 20.0 mL of 0.800 M FeI3 with 50.0 mL of 0.300 M Pb(NO3)2, which reactant is the limiting reagent?

Accepted Answer

Pb(NO3)2

Question 16

Which of the following best describes the process of reduction?

Accepted Answer

Gain of electrons; oxidation number decreases.

Question 17

What is the correct stoichiometric factor to convert from moles of A to moles of B in a chemical reaction?

Accepted Answer

The coefficients from the balanced chemical equation.

Question 18

If 50.0 mL of 2.95 M HCl is required to react completely with 49.1 mL of Ba(OH)2, what is the concentration of Ba(OH)2? (Reaction: $$2\mathrm{HCl} + \mathrm{Ba(OH)_2} \rightarrow 2\mathrm{H_2O} + \mathrm{$$BaCl_2$$})$$

Accepted Answer

0.601 M

Question 19

Which of the following is the correct half-reaction for the oxidation of Zn in the reaction $$\mathrm{Zn(s) + 2H^+(aq) \rightarrow Zn$$^{2+}$$(aq) + H_2$(g)}$$?

Accepted Answer

$$\mathrm{Zn(s) \rightarrow Zn$$^{2+}$$(aq) + 2e^-}$$

Aqueous Reactions and Solution Stoichiometry: Study Guide

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