Question 1

Which term describes a solution that contains the maximum amount of dissolved solute at a given temperature?

Accepted Answer

Saturated

Question 2

A student dissolves 100g of salt in 100g of water at 25°C, reaching the equilibrium concentration. What type of solution is formed?

Accepted Answer

Saturated

Question 3

If a solution contains less solute than the equilibrium concentration, it is classified as:

Accepted Answer

Unsaturated

Question 4

Which of the following best describes a supersaturated solution?

Accepted Answer

A solution that contains more solute than it can hold at equilibrium

Question 5

Caffeine is about 10 times as soluble in warm water as in cold water. If a student adds caffeine to hot water and then cools it, what is the likely result?

Accepted Answer

The solution becomes supersaturated

Question 6

As temperature increases, the solubility of most solid solutes in a liquid solvent:

Accepted Answer

Increases

Question 7

As temperature increases, the solubility of gases in a liquid solvent generally:

Accepted Answer

Decreases

Question 8

Which equation best represents the relationship between solubility ($$S) $$and temperature ($$T) $$for most solid solutes?

Accepted Answer

$$S \propto T$$

Question 9

A student prepares a solution by dissolving 120g of sugar in 100g of water at 80°C, then cools it to 25°C where the equilibrium solubility is 100g per 100g water. What will happen?

Accepted Answer

20g of sugar will crystallize out

Question 10

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

Accepted Answer

Sugar solution used to make rock candy

Question 11

If a solution is saturated at 25°C and you add more solute, what will happen?

Accepted Answer

The extra solute will precipitate out

Question 12

Which statement is true regarding the solubility of gases in liquids as temperature increases?

Accepted Answer

Solubility decreases

Question 13

A student adds 100g of salt to 100g of water at 25°C, but only 80g dissolves. What type of solution is formed?

Accepted Answer

Unsaturated

Question 14

Which process is used to create a supersaturated solution in the laboratory?

Accepted Answer

Dissolve solute at high temperature and cool slowly

Question 15

Why does soda go flat faster when left out in warm conditions?

Accepted Answer

The solubility of CO$$_2$$ gas decreases as temperature increases

Question 16

If a solution is supersaturated, what is likely to happen if a seed crystal is added?

Accepted Answer

The excess solute will rapidly crystallize out

Question 17

Which of the following best explains why solubility of most solids increases with temperature?

Accepted Answer

Increased kinetic energy allows more solute particles to interact with solvent

Question 18

A solution contains 100g of solute in 100g of water at 25°C. If the equilibrium solubility is 80g per 100g water, what is the solution's identity?

Accepted Answer

Supersaturated

Question 19

Which of the following is NOT a factor that affects solubility?

Accepted Answer

Color of solute

Question 20

A student heats a solution to dissolve more solute, then cools it and observes crystals forming. What does this indicate?

Accepted Answer

The solution was supersaturated

Solubility and Temperature Effects in Solutions

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