Question 1

Which of the following best describes a solution?

Accepted Answer

A homogeneous mixture of two or more substances.

Question 2

Which equation correctly represents the solubility product ($$K_{sp}) $$for silver chloride ($$AgCl$$)?

Accepted Answer

$$K_{sp} = [Ag^+][Cl^-]$$

Question 3

A saturated solution of NaCl is prepared at 25°C. What will happen if more NaCl is added?

Accepted Answer

The added NaCl will remain undissolved at the bottom.

Question 4

Which factor will increase the solubility of a gas in water?

Accepted Answer

Increasing the pressure.

Question 5

Which of the following is a colligative property?

Accepted Answer

Boiling point elevation.

Question 6

What is the effect of adding NaCl to water on its freezing point?

Accepted Answer

The freezing point decreases.

Question 7

Which equation is used to calculate the freezing point depression ($$\Delta T_f) of a $$solution?

Accepted Answer

$$\Delta T_f = K_f \cdot m$$

Question 8

A student dissolves 0.1 mol of NaCl in 1 kg of water. What is the molality of the solution?

Accepted Answer

0.1 mol/kg

Question 9

Which of the following best explains why oil and water do not mix?

Accepted Answer

Oil molecules are nonpolar and water molecules are polar.

Question 10

What is the effect of the common ion on the solubility of a slightly soluble salt?

Accepted Answer

It decreases the solubility.

Question 11

Which of the following is true about colligative properties?

Accepted Answer

They depend on the number of solute particles.

Question 12

Which equation represents the relationship between pressure and solubility of a gas in a liquid (Henry's Law)?

Accepted Answer

$$C = k_H \cdot P$$

Question 13

A solution is prepared by dissolving 0.5 mol of glucose in 1 kg of water. What is the mole fraction of glucose?

Accepted Answer

0.027

Question 14

Which of the following will increase the boiling point of water?

Accepted Answer

Adding sugar.

Question 15

What is the effect of temperature on the solubility of most solid solutes in water?

Accepted Answer

Solubility increases with increasing temperature.

Question 16

Which of the following is the correct expression for the solubility product of $$Ca_3$$($$PO_4)_2$?

Accepted Answer

$$K_{sp} = [Ca$$^{2+}$$]^3[PO_4$^{3-}]^2$$

Question 17

Why does the solubility of oxygen in ocean water decrease as temperature increases?

Accepted Answer

Gas molecules escape more easily from the solution at higher temperatures.

Question 18

Which of the following best describes osmotic pressure?

Accepted Answer

The pressure required to stop the flow of solvent through a semipermeable membrane.

Question 19

Which of the following is a real-world application of freezing point depression?

Accepted Answer

Adding salt to icy roads to melt ice.

Question 20

A solution contains 0.2 mol of NaCl and 0.8 mol of water. What is the mole fraction of NaCl?

Accepted Answer

0.2 / (0.2 + 0.8) = 0.2

Solutions, Solubility, and Colligative Properties in General Chemistry

Study Guide - Practice Questions