Question 1

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

Accepted Answer

It completely dissociates into ions and strongly conducts electricity.

Question 2

Which compound will form a precipitate when mixed with an aqueous solution of Na2SO4, according to the solubility rules?

Accepted Answer

BaCl2

Question 3

What is the net ionic equation for the reaction between aqueous solutions of Pb(NO3)2 and KI?

Accepted Answer

$$\mathrm{Pb$$^{2+}$$(aq) + 2I^-(aq) \rightarrow $$PbI_2$$(s)}$$

Question 4

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

Accepted Answer

C6H12O6

Question 5

A solution is prepared by dissolving 0.5 mol of NaCl in enough water to make 1.0 L of solution. What is the molarity of the solution?

Accepted Answer

$$0.5\ \mathrm{M}$$

Question 6

Which of the following acids is a strong acid and a strong electrolyte?

Accepted Answer

HNO3

Question 7

What is the oxidation number of sulfur in $$\mathrm{SO_4$^{2-}}$$?

Accepted Answer

$$+6$$

Question 8

Which of the following reactions is a redox reaction?

Accepted Answer

$$\mathrm{Zn(s) + 2HCl(aq) \rightarrow $$ZnCl_2$$(aq) + H_2$(g)}$$

Question 9

A student wants to prepare 250 mL of a 0.10 M NaOH solution from a 1.0 M stock solution. What volume of the stock solution should be used?

Accepted Answer

$$25\ \mathrm{mL}$$

Question 10

Which of the following best describes the role of an antacid such as Mg(OH)2 in the stomach?

Accepted Answer

It acts as a strong base to neutralize excess stomach acid.

Question 11

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

Accepted Answer

AgCl

Question 12

What is the balanced molecular equation for the reaction of sodium carbonate with hydrochloric acid?

Accepted Answer

$$\mathrm{Na_2CO_3(aq) + 2HCl(aq) \rightarrow 2NaCl(aq) + CO_2$(g) + H_2O(l)}$$

Question 13

Which of the following is the correct net ionic equation for the neutralization of HCl with NaOH?

Accepted Answer

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

Question 14

Which of the following best describes the process of solvation?

Accepted Answer

The surrounding of solute particles by solvent molecules.

Question 15

Which of the following metals will NOT react with hydrochloric acid to produce hydrogen gas, based on the activity series?

Accepted Answer

Copper

Question 16

A solution contains 0.20 mol of KBr dissolved in 500 mL of water. What is the molarity of the solution?

Accepted Answer

$$0.40\ \mathrm{M}$$

Question 17

Which of the following is a weak base and a weak electrolyte?

Accepted Answer

NH3

Question 18

What is the oxidation number of oxygen in hydrogen peroxide ($$\mathrm{H_2O_2}$$)?

Accepted Answer

$$-1$$

Question 19

During a titration, 25.0 mL of 0.200 M HCl is required to neutralize 50.0 mL of NaOH solution. What is the concentration of the NaOH solution?

Accepted Answer

$$0.100\ \mathrm{M}$$

Chapter 4: Reactions in Aqueous Solution – General Chemistry Study Notes

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