Solutions: Types, Solubility, Concentration, and Colligative Properties

Question 1

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

Accepted Answer

Heterogeneous mixture

Answer

Homogeneous mixture

Answer

Stable mixture

Answer

Contains dissolved particles

Question 2

Which concentration unit expresses the amount of solute per kilogram of solvent?

Accepted Answer

Molality

Answer

Molarity

Answer

Percentage by mass

Answer

Normality

Question 3

Which of the following is NOT a colligative property?

Accepted Answer

Solubility

Answer

Freezing point depression

Answer

Boiling point elevation

Answer

Osmotic pressure

Question 4

A solution labeled as 2.5 M NaCl contains:

Accepted Answer

2.5 moles of NaCl per liter of solution

Answer

2.5 moles of NaCl per liter of solvent

Answer

2.5 kilograms of NaCl per liter of solution

Answer

2.5 kilograms of NaCl per liter of solvent

Question 5

A solution with a molality of 0.5 m contains:

Accepted Answer

0.5 mol of solute per 1 kg of solvent

Answer

0.5 mol of solute per 1 L of solution

Answer

0.5 kg of solute per 1 L of solvent

Answer

0.5 kg of solute per 1 kg of solvent

Question 6

Which of the following is a consequence of freezing point depression?

Accepted Answer

Saltwater freezes at a lower temperature

Answer

Ice melts at a higher temperature

Answer

Water boils at a lower temperature

Answer

Sugar dissolves faster in cold water

Question 7

Osmotic pressure is the:

Accepted Answer

Pressure required to prevent the flow of solvent from a low-concentration solution to a high-concentration solution

Answer

Pressure required to prevent the flow of solute from a high-concentration solution to a low-concentration solution

Answer

Pressure exerted by the solvent on the solute

Answer

Pressure exerted by the solute on the solvent

Question 8

Which of the following is **not** a colligative property of solutions?

Accepted Answer

Electrical conductivity

Answer

Boiling point elevation

Answer

Freezing point depression

Answer

Vapor pressure lowering

Question 9

Solubility is defined as:

Accepted Answer

The amount of solute that can dissolve in a given amount of solvent

Answer

The concentration of the solution at which precipitation occurs

Answer

The mass of solute per unit volume of solvent

Answer

The ratio of solute to solvent in a solution at equilibrium

Question 10

Which concentration unit expresses the number of moles of solute per liter of solution?

Accepted Answer

Molarity

Answer

Mass percent

Answer

Molality

Answer

Parts per million

Question 11

Colligative properties of solutions depend on:

Accepted Answer

The concentration of the solution

Answer

The nature of the solute

Answer

The volume of the solution

Answer

The temperature of the solution

Question 12

Vapor pressure lowering is a colligative property that describes:

Accepted Answer

The lowering of the vapor pressure of a solvent

Answer

The elevation of the boiling point of a solvent

Answer

The depression of the freezing point of a solvent

Answer

The increase in osmotic pressure

Question 13

Osmotic pressure is directly proportional to:

Accepted Answer

Concentration

Answer

Temperature

Answer

Volume

Answer

Solvent type

Question 14

Which factor does not affect the rate of dissolution of a solid in a liquid?

Accepted Answer

Pressure

Answer

Surface area of the solid

Answer

Temperature

Answer

Stirring

Question 15

Dialysis is a process that separates a solid from a liquid mixture using:

Accepted Answer

A semi-permeable membrane

Answer

Filtration

Answer

Distillation

Answer

Evaporation

Question 16

Which application does not involve the use of solutions?

Accepted Answer

Fuel combustion

Answer

Electroplating

Answer

Battery operation

Answer

Drug delivery

Question 17

Which of the following is **not** considered a type of solution?

Accepted Answer

Suspension

Answer

True solution

Answer

Gas

Answer

Colloid

Question 18

Which of the following statements about electrolytes is true?

Accepted Answer

They conduct electricity in aqueous solutions.

Answer

They are covalent compounds.

Answer

They are insoluble in water.

Answer

They are non-polar

Question 19

Which of the following is **not** a characteristic of a buffer solution?

Accepted Answer

A solution with a pH of 7.

Answer

A solution that resists changes in pH upon the addition of small amounts of acid or base.

Answer

A solution containing a weak acid and its conjugate base.

Question 20

Which of the following is **not** a characteristic of a saturated solution?

Accepted Answer

A solution in which the solvent is in excess.

Answer

A solution in equilibrium with undissolved solute.

Answer

A solution in which the maximum amount of solute has dissolved at a given temperature.

Question 21

Which of the following is NOT a colligative property of solutions?

Accepted Answer

Color

Answer

Freezing point depression

Answer

Vapor pressure lowering

Answer

Boiling point elevation

Question 22

Which of the following solutions would have the highest boiling point?

Accepted Answer

1.0 M NaCl

Answer

1.0 M sucrose

Answer

1.0 M urea

Answer

1.0 M glucose