Question 1

Which of the following best describes a solution?

Accepted Answer

A homogeneous mixture in which the solute is uniformly dispersed in the solvent.

Question 2

In a mixture of 2 grams of sugar and 100 mL of water, which is the solute and which is the solvent?

Accepted Answer

Sugar is the solute; water is the solvent.

Question 3

Which of the following statements about water as a solvent is TRUE?

Accepted Answer

Water is a polar solvent and can form hydrogen bonds with other polar molecules.

Question 4

Which of the following combinations will NOT form a solution?

Accepted Answer

Polar solute and nonpolar solvent

Question 5

What happens when NaCl is added to water?

Accepted Answer

NaCl dissociates into $$\mathrm{Na^+}$$ and $$\mathrm{Cl^-}$$ ions, which are hydrated by water molecules.

Question 6

Which of the following is a strong electrolyte?

Accepted Answer

Sodium chloride ($$\mathrm{NaCl})$$

Question 7

A solution in which more solute can still dissolve at a given temperature is called:

Accepted Answer

Unsaturated

Question 8

Which of the following best explains why oil does not dissolve in water?

Accepted Answer

Oil is nonpolar and water is polar, so there are no attractive forces between them.

Question 9

Which of the following will increase the solubility of a solid solute in water?

Accepted Answer

Increasing the temperature

Question 10

According to Henry’s Law, what happens to the solubility of a gas in a liquid as the pressure of the gas above the liquid increases?

Accepted Answer

The solubility increases.

Question 11

Which of the following ionic compounds is soluble in water according to the solubility rules?

Accepted Answer

$$\mathrm{Na_2SO_4}$$

Question 12

A solution is prepared by dissolving 60 g of KBr in 100 g of water at 40°C. If the solubility of KBr at 40°C is 80 g/100 g H$$_2O$$, the solution is:

Accepted Answer

Unsaturated

Question 13

Which of the following best describes a nonelectrolyte?

Accepted Answer

A substance that dissolves in water but does not produce ions.

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

If a solution contains undissolved solute at the bottom of the container and the rate of dissolving equals the rate of crystallization, the solution is:

Accepted Answer

Saturated

Question 16

Which of the following best explains why carbonated drinks lose their fizz when opened?

Accepted Answer

The pressure above the liquid decreases, reducing the solubility of CO$$_2.$$

Question 17

Which of the following is a weak electrolyte?

Accepted Answer

HF

Question 18

A student adds sugar to a cup of hot tea and observes that all the sugar dissolves. What can be concluded about the solution?

Accepted Answer

The solution is unsaturated.

Question 19

Which of the following best describes the process of hydration?

Accepted Answer

Water molecules surround and interact with ions or polar molecules, stabilizing them in solution.

Question 20

Which of the following would increase the amount of gas dissolved in a liquid?

Accepted Answer

Increasing the pressure above the liquid

Solutions: Properties, Formation, and Solubility (GOB Chemistry Study Notes)

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