Question 1

Which of the following best describes a solution?

Accepted Answer

A homogeneous mixture of two or more substances in a single phase.

Question 2

Which of the following is an example of an electrolyte solution?

Accepted Answer

A solution of NaCl in water.

Question 3

Why does a solution of NaCl in water conduct electricity, while a solution of sugar in water does not?

Accepted Answer

NaCl dissociates into ions, while sugar does not.

Question 4

Which of the following will increase the rate at which a solid solute dissolves in a solvent?

Accepted Answer

Stirring the solution.

Question 5

A student adds more solute to a solution and observes that it does not dissolve. What type of solution does the student have?

Accepted Answer

Saturated solution

Question 6

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

Accepted Answer

Oil is nonpolar and water is polar, so they are immiscible.

Question 7

Which of the following statements about the heat of solution is correct?

Accepted Answer

If the sum of the energy absorbed in steps 1 and 2 is less than the energy released in step 3, the process is exothermic.

Question 8

A solution is prepared by dissolving 40 g of KNO$$_3 in 100 g of $$water at 30$$^	ext{o}C. $$According to the solubility graph, is the solution saturated, unsaturated, or supersaturated?

Accepted Answer

Unsaturated

Question 9

Which of the following best describes the process of dissociation?

Accepted Answer

The separation of an ionic compound into its ions when dissolved in water.

Question 10

Which of the following is a real-life example of a supersaturated solution?

Accepted Answer

A carbonated beverage that fizzes when opened.

Question 11

Which of the following best describes the term 'miscible'?

Accepted Answer

Two liquids that mix in all proportions to form a homogeneous solution.

Question 12

Which of the following is NOT a factor that affects the rate of dissolution?

Accepted Answer

The color of the solute

Question 13

A flask feels cold to the touch after a salt is dissolved in water. What does this indicate about the heat of solution?

Accepted Answer

The dissolution process is endothermic.

Question 14

Which of the following best explains why 'like dissolves like'?

Accepted Answer

Polar solvents dissolve polar and ionic solutes due to similar intermolecular forces.

Question 15

Which of the following is a nonelectrolyte?

Accepted Answer

C$$_6H$_{12}O$_6 ($$glucose)

Question 16

A student wants to prepare a supersaturated solution. Which of the following steps should they follow?

Accepted Answer

Heat the solvent, dissolve more solute than normally possible, then slowly cool the solution.

Question 17

Which of the following best describes solution equilibrium?

Accepted Answer

The rate of dissolving equals the rate of crystallization.

Question 18

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

Accepted Answer

$$\mathrm{NaCl} \rightarrow \mathrm{Na}^+ + \mathrm{Cl}^-$$

Question 19

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

Accepted Answer

Brass (zinc and copper)

Question 20

If the heat of solution for a process is $$-15\ \mathrm{kJ/mol}$$, what does this indicate?

Accepted Answer

The process is exothermic and releases energy.

Solutions and the Solution Process: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard