Solubility Curves Worksheet

Question 1

A salt has a solubility of 25 g per 100 g water at 30 °C. What is the maximum mass of salt that can dissolve in 200 g water at that temperature?

1. 12.5 g
2. 25 g
3. 50 g
4. 200 g

Question 2

At a given temperature, a salt has a solubility of 40 g per 100 g water. A solution contains 25 g dissolved in 100 g water at that temperature. Explain why the solution is unsaturated.

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Question 3

A saturated solution cools without losing water. Its solute is less soluble at the lower temperature. What can happen as it reaches equilibrium?

1. Some dissolved solute crystallizes.
2. More solute must dissolve from the air.
3. All dissolved solute stays dissolved regardless of the new limit.
4. The mass of solvent doubles.

Question 4

A plotted point lies below a salt’s solubility curve. What does the point tell you about the amount of salt dissolved at that temperature?

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Question 5

At what temperature shown do salt A and salt B have the same solubility?

1. 20 °C
2. 40 °C
3. 60 °C
4. 80 °C

Question 6

A saturated solution of salt A in 100 g water cools from 80 °C to 40 °C. How much salt crystallizes at equilibrium if no water evaporates? Use the graph.

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Question 7

At 60 °C, what is the difference between the solubilities of the two salts per 100 g water?

1. 0 g
2. 5 g
3. 10 g
4. 20 g

Question 8

Which salt’s solubility changes less from 20 °C to 80 °C? Use data from the graph.

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