Question 1

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

Accepted Answer

It completely dissociates into ions when dissolved in water.

Question 2

Which compound will form a precipitate when mixed with a 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 AgNO3 and NaCl?

Accepted Answer

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

Question 4

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

Accepted Answer

C12H22O11 (sucrose)

Question 5

A solution is prepared by dissolving 0.50 mol of NaCl in enough water to make 1.0 L of solution. What is the molarity of the solution?

Accepted Answer

$$ 0.50\ \mathrm{M} $$

Question 6

Which of the following acids is classified as a strong acid?

Accepted Answer

Hydrochloric acid, $$ \mathrm{HCl} $$

Question 7

Which of the following statements about oxidation numbers is correct?

Accepted Answer

The sum of the oxidation numbers in a polyatomic ion equals the charge of the ion.

Question 8

A student mixes solutions of Pb(NO3)2 and KI. What is the balanced molecular equation for the reaction?

Accepted Answer

$$ \mathrm{Pb(NO_3$)_2 (aq) + 2KI (aq) \rightarrow $$PbI_2$$ (s) + 2KNO_3 (aq)} $$

Question 9

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

Accepted Answer

Copper

Question 10

What is the final concentration when 50.0 mL of 6.0 M HCl is diluted to a total volume of 300.0 mL?

Accepted Answer

$$ 1.0\ \mathrm{M} $$

Question 11

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 12

A solution contains 0.10 M Na2SO4 and 0.10 M Ba(NO3)2. What will happen when these solutions are mixed?

Accepted Answer

A precipitate of BaSO4 will form.

Question 13

Which of the following best describes the role of a base in aqueous solution?

Accepted Answer

It increases the concentration of $$ \mathrm{OH^-} $$ ions.

Question 14

Which of the following is the correct balanced 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 15

During a titration, 25.0 mL of 0.200 M H2SO4 is required to neutralize 50.0 mL of NaOH. What is the concentration of the NaOH solution?

Accepted Answer

$$ 0.400\ \mathrm{M} $$

Question 16

Which of the following statements about redox reactions is correct?

Accepted Answer

Oxidation and reduction always occur together.

Question 17

Which of the following antacids contains both magnesium hydroxide and calcium carbonate as active ingredients?

Accepted Answer

Di-Gel

Question 18

Which of the following is the correct order of steps for preparing a solution of known molarity?

Accepted Answer

Weigh solute, add solute to flask, add solvent to calibration mark, mix.

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

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