Question 1

Which of the following statements best describes an aqueous solution?

Accepted Answer

A homogeneous mixture in which water is the solvent.

Question 2

When sodium chloride ($\mathrm{NaCl}$) dissolves in water, what process occurs?

Accepted Answer

Dissociation into $\mathrm{Na^+}$ and $\mathrm{Cl^-}$ ions surrounded by water molecules.

Question 3

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

Accepted Answer

Sodium hydroxide ($\mathrm{NaOH}$)

Question 4

Which of the following is NOT a characteristic of a strong electrolyte?

Accepted Answer

It only partially dissociates in water.

Question 5

A solution of $\mathrm{CH_3COOH}$ (acetic acid) in water is classified as:

Accepted Answer

A weak electrolyte.

Question 6

Which of the following combinations will produce a precipitate when mixed in aqueous solution?

Accepted Answer

$\mathrm{Pb(NO_3)_2}$ and $\mathrm{KCl}$

Question 7

What is the net ionic equation for the reaction between $\mathrm{Pb(NO_3)_2}$ (aq) and $\mathrm{KCl}$ (aq)?

Accepted Answer

$\mathrm{Pb^{2+}(aq) + 2Cl^-(aq) \rightarrow PbCl_2(s)}$

Question 8

Which of the following is a spectator ion in the reaction between $\mathrm{Pb(NO_3)_2}$ (aq) and $\mathrm{KCl}$ (aq)?

Accepted Answer

$\mathrm{K^+}$

Question 9

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

Accepted Answer

Hydrochloric acid ($\mathrm{HCl}$)

Question 10

What is the balanced molecular equation for the neutralization of hydrochloric acid with sodium hydroxide?

Accepted Answer

$\mathrm{HCl(aq) + NaOH(aq) \rightarrow H_2O(l) + NaCl(aq)}$

Question 11

A student mixes $\mathrm{Na_2CO_3}$ (aq) with $\mathrm{HCl}$ (aq). What gas is produced?

Accepted Answer

$\mathrm{CO_2}$

Question 12

Which of the following is the correct formula for calculating molarity?

Accepted Answer

$\mathrm{M = \frac{moles\ of\ solute}{volume\ of\ solution\ (L)}}$

Question 13

If you dilute 100 mL of a 2.0 M $\mathrm{NaCl}$ solution to a final volume of 500 mL, what is the new molarity?

Accepted Answer

$\mathrm{0.40\ M}$

Question 14

Which of the following is true about oxidation-reduction (redox) reactions?

Accepted Answer

Oxidation and reduction always occur together.

Question 15

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

Accepted Answer

$-1$

Question 16

Which element has an oxidation number of zero in its elemental form?

Accepted Answer

Chlorine in $\mathrm{Cl_2}$ gas

Question 17

A metal higher than hydrogen in the activity series will:

Accepted Answer

React with acids to produce hydrogen gas.

Question 18

Which of the following is a correct application of the dilution equation $\mathrm{M_1V_1 = M_2V_2}$?

Accepted Answer

Determining the final concentration after adding solvent.

Question 19

During a titration, the equivalence point is reached when:

Accepted Answer

The moles of acid equal the moles of base.

Reactions in Aqueous Solution: Electrolytes, Dissolution, and Solution Chemistry

Study Guide - Practice Questions