Question 1

Which of the following best describes an aqueous solution?

Accepted Answer

A solution in which water is the solvent.

Question 2

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

Accepted Answer

Dissociation, where $\mathrm{Na^+}$ and $\mathrm{Cl^-}$ ions separate and are surrounded by water molecules.

Question 3

Which of the following is a correct example of a solution, its solvent, and its solute?

Accepted Answer

Soft drink: Solvent $\mathrm{H_2O}$, Solute sugar and $\mathrm{CO_2}$

Question 4

Why is water considered a very effective solvent for ionic compounds?

Accepted Answer

Because water molecules have both positive (H atoms) and negative (O atom) regions, allowing them to stabilize separated ions.

Question 5

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

Accepted Answer

Sodium chloride ($\mathrm{NaCl}$)

Question 6

Which statement best explains why molecular compounds like sucrose do not conduct electricity in aqueous solution?

Accepted Answer

They dissolve by solvation but do not dissociate into ions.

Question 7

A student dissolves acetic acid ($\mathrm{CH_3COOH}$) in water. What type of electrolyte is formed and why?

Accepted Answer

Weak electrolyte, because it only partially dissociates and establishes equilibrium.

Question 8

Which of the following best describes the process of solvation?

Accepted Answer

The surrounding of solute ions or molecules by solvent molecules.

Question 9

Which of the following solutions will NOT conduct electricity?

Accepted Answer

A solution of sucrose ($\mathrm{C_{12}H_{22}O_{11}}$) in water.

Question 10

Which of the following is true about weak electrolytes in aqueous solution?

Accepted Answer

They partially dissociate and establish a reversible equilibrium.

Question 11

A patient is given a saline solution intravenously. Which property of the solution ensures it can conduct electricity in the body?

Accepted Answer

It contains ionic compounds that dissociate into cations and anions.

Question 12

Which equation correctly represents the dissociation of sodium chloride in water?

Accepted Answer

$\mathrm{NaCl (s) \rightarrow Na^+ (aq) + Cl^- (aq)}$

Question 13

Which of the following is a nonelectrolyte?

Accepted Answer

Sucrose ($\mathrm{C_{12}H_{22}O_{11}}$)

Question 14

Which of the following best explains why ionic compounds dissolve in water?

Accepted Answer

Water molecules surround and stabilize the separated ions due to their polarity.

Question 15

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

Accepted Answer

They establish a reversible equilibrium in solution.

Question 16

A solution of $\mathrm{CH_3COOH}$ in water is tested for electrical conductivity. What result is expected and why?

Accepted Answer

Low conductivity, because $\mathrm{CH_3COOH}$ is a weak electrolyte and only partially ionizes.

Question 17

Which of the following best describes the difference between dissociation and solvation?

Accepted Answer

Dissociation is the breaking of ionic bonds to form ions; solvation is the surrounding of these ions by solvent molecules.

Question 18

Which of the following is a real-world example of a weak electrolyte?

Accepted Answer

Vinegar, which contains acetic acid ($\mathrm{CH_3COOH}$)

Question 19

Which of the following statements is true regarding the electrolytic behavior of molecular compounds?

Accepted Answer

Some molecular compounds are weak electrolytes if they partially ionize in water.

Reactions in Aqueous Solutions: Properties, Types, and Electrolytic Behavior

Study Guide - Practice Questions