Question 1

Which of the following best describes a solution?

Accepted Answer

A homogeneous mixture of two or more substances

Question 2

In a solution of 10 g NaCl dissolved in 100 mL of water, which is the solute and which is the solvent?

Accepted Answer

NaCl is the solute; water is the solvent

Question 3

Which of the following statements about solutes is FALSE?

Accepted Answer

Solutes are always visible in a solution

Question 4

Which of the following combinations will NOT form a solution?

Accepted Answer

Water and carbon tetrachloride

Question 5

Why is water considered a polar solvent?

Accepted Answer

Because it forms hydrogen bonds due to its polar O-H bonds

Question 6

Which of the following best explains why NaCl dissolves in water?

Accepted Answer

Na+ ions are attracted to the oxygen atom (δ−) of water, and Cl− ions are attracted to the hydrogen atom (δ+) of water

Question 7

Which of the following solutes will dissolve in water? Select all that apply.

Accepted Answer

$$\mathrm{Na_2SO_4}$$

Question 8

A dialysis patient experiences side effects due to improper regulation of water in their cells. This is primarily due to:

Accepted Answer

The inability of the body to regulate the concentration of electrolytes and remove waste products

Question 9

Which of the following is an example of a solid dissolved in a liquid?

Accepted Answer

Seawater

Question 10

Which statement best describes the principle 'like dissolves like'?

Accepted Answer

Polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes

Question 11

Which of the following is a correct representation of the hydration of NaCl in water?

Accepted Answer

$$\mathrm{NaCl(s) \xrightarrow{H_2O} Na^+(aq) + Cl^-(aq)}$$

Question 12

Which of the following is NOT a property of a solution?

Accepted Answer

The solute can be separated by filtration

Question 13

Which of the following best explains why methanol ($$\mathrm{CH_3OH}) is $$soluble in water?

Accepted Answer

Methanol has a polar $$\mathrm{OH}$$ group that forms hydrogen bonds with water

Question 14

Which of the following is an example of a gas dissolved in a liquid?

Accepted Answer

Soda water ($$\mathrm{CO_2$} in$$ $$\mathrm{H_2O})$$

Question 15

A student mixes 60.0 mL of ethyl alcohol and 30.0 mL of methyl alcohol. Which is the solute?

Accepted Answer

Methyl alcohol

Question 16

Which of the following best describes why gasoline does not dissolve in water?

Accepted Answer

Gasoline is nonpolar and water is polar

Question 17

Which of the following is a correct example of a solid solution?

Accepted Answer

Brass (Zn in Cu)

Question 18

Which of the following is NOT a way to separate a solute from a solvent in a solution?

Accepted Answer

Filtration

Question 19

Which of the following best describes the interaction between solute and solvent in the formation of a solution?

Accepted Answer

Solute–solvent interactions must be large enough to overcome solute–solute and solvent–solvent interactions

Question 20

Which of the following is the best explanation for why $$\mathrm{I_2$}$$ does not dissolve in water?

Accepted Answer

$$\mathrm{I_2$} is $$nonpolar and water is polar

Chapter 9: Solutions – Structure and Properties

Study Guide - Practice Questions