Answers2026-2027 Chemistry - VirtualPercent Composition and Molecular Formula

Solutions and Solubility Answers

10 verified answers
1
Free Preview

The concentration of a solute in a solution is greater than the maximum concentration that is predicted from the solute's solubility. What is the best way to describe this solution?

A
diluted
B
saturated
C
unsaturated
D
supersaturated
2
Free Preview

A chemist has dissolved a certain substance in water. The chemist knows that more of the substance could be dissolved into the water before it stops dissolving. Therefore, the current solution is

A
unsaturated
B
saturated
C
supersaturated
3

A chemist dissolved crystals of an unknown substance into water at room temperature. He found that 33 g of the substance can be dissolved into 100 mL of water. What property of the unknown substance was the chemist most likely investigating?

A
its solubility
B
its rate of dissolution
C
its chemical reaction to water
D
its reaction to temperature changes
4

Under which conditions would the solubility of a gas be greatest?

A
high pressure and high temperature
B
high pressure and low temperature
C
low pressure and high temperature
D
low pressure and low temperature
5

Under which conditions will sugar most likely dissolve fastest in a cup of water?

A
a sugar cube with stirring at 5°C
B
a sugar cube without stirring at 15°C
C
sugar crystals with stirring at 15°C
D
sugar crystals without stirring at 5°C
6

Which is true about the dissolving process in water?

A
Nonpolar solutes dissolve easily in water.
B
Solute molecules surround water molecules.
C
Molecules or ions of a solute spread throughout the water molecules.
D
Water molecules are repelled by solute ions at the surface of the solute.
7

Which refers to the amount of a solute that will dissolve in a given volume of solvent at a given temperature and pressure?

A
solubility
B
supersaturated
C
dissolution rate
D
concentrated
8

The graph below shows how solubility changes with temperature.Which two solutions have similar solubilities at 40°C?

Question illustration
A
Na2SO4 and NaCl
B
Na2HAsO4 and NaCl
C
Na2HAsO4 and Na2SO4
D
Ba(NO3)2 and Ce2(SO4)3 • 9H2O
9

A beaker contains a solution. A single solute crystal is added to the solution. Immediately, crystals form in the solution. Which term best describes the solution before the crystal was added?

A
supersaturated
B
unsaturated
C
diluted
D
saturated
10

The graph below shows how solubility changes with temperature.What is the solubility of Na2HAsO4 at 60°C?

Question illustration
A
20 g/100 mL of water
B
46 g/100 mL of water
C
65 g/100 mL of water
D
70 g/100 mL of water
11

The graph below shows how solubility changes with temperature.What is the solubility of Na2HAsO4 at 60°C?

Question illustration
A
20 g/100 mL of water
B
46 g/100 mL of water
C
65 g/100 mL of water
D
70 g/100 mL of water
12

Solute crystals are added to a solution until they begin to sink to the bottom of their container. The solution is then heated, and many more solute crystals dissolve. Which term best describes the solution immediately after it was heated?

A
saturated
B
unsaturated
C
concentrated
D
supersaturated
13

Under which conditions would the solubility of a gas be greatest?

A
high pressure and high temperature
B
high pressure and low temperature
C
low pressure and high temperature
D
low pressure and low temperature
14

The concentration of a solute in a solution is greater than the maximum concentration that is predicted from the solute's solubility. What is the best way to describe this solution?

A
diluted
B
saturated
C
unsaturated
D
supersaturated
15

A 1-L soda bottle contains dissolved carbon dioxide gas. Which bottle would have the highest concentration of dissolved gas?

A
a bottle that is sealed
B
a bottle that was opened 1 minute ago
C
a bottle that was opened 1 hour ago
D
a bottle that was opened 1 day ago
16

A chemist dissolved crystals of an unknown substance into water at room temperature. He found that 33 g of the substance can be dissolved into 100 mL of water. What property of the unknown substance was the chemist most likely investigating?

A
its solubility
B
its rate of dissolution
C
its chemical reaction to water
D
its reaction to temperature changes
17

Which is true about the dissolving process in water?

A
Nonpolar solutes dissolve easily in water.
B
Solute molecules surround water molecules.
C
Molecules or ions of a solute spread throughout the water molecules.
D
Water molecules are repelled by solute ions at the surface of the solute.
18

Which method would increase the solubility of a gas?

A
increasing the pressure
B
stirring the solvent quickly
C
increasing the temperature
D
decreasing the amount of solvent
19

Which is true about dissolving a polar substance in water?

A
The solvent particles are all nonpolar molecules.
B
The solute particles are carried into the solution.
C
The solute particles have no attraction for the solvent molecules.
D
The solute particles are very different from the solvent molecules.
20

The graph below shows how solubility changes with temperature.Which two solutions have similar solubilities at 40°C?

Question illustration
A
Na2SO4 and NaCl
B
Na2HAsO4 and NaCl
C
Na2HAsO4 and Na2SO4
D
Ba(NO3)2 and Ce2(SO4)3 • 9H2O

Did you find these answers helpful?

More from this Course

Quiz
11 verified answers

Limiting Reactant and Percent Yield

Quiz
10 verified answers

Types of Reactions

Quiz
12 verified answers

Percent Composition and Molecular Formula