Solubility Curves: Key Concepts and Problem Solving

What is solubility?

• The temperature at which a solute dissolves in a solvent

• The mixture produced when a solute dissolves in a solvent

• The process of a solute dissolving in a solvent

• The maximum amount of solute that can dissolve in a given amount of solvent

How does temperature generally affect the solubility of solids in water?

• Solubility does not change with temperature

• Temperature has an unpredictable effect on solubility

• Solubility increases as temperature increases

• Solubility decreases as temperature increases

At what temperature does KCl have a solubility of 40 grams per 100 grams of water?

• 60 degrees Celsius

• 30 degrees Celsius

• 50 degrees Celsius

• 42 degrees Celsius

Which compound is most soluble at 40 degrees Celsius?

• Sodium nitrate (NaNO3)

• Calcium chloride (CaCl2)

• Potassium chloride (KCl)

• Potassium nitrate (KNO3)

Which compound is least soluble at 10 degrees Celsius?

• Calcium chloride (CaCl2)

• Cerium sulfate (Ce2(SO4)3)

• Potassium sulfate (K2SO4)

• Potassium nitrate (KNO3)

What type of solution can still dissolve more solute at a given temperature?

• Soluble

• Supersaturated

• Saturated

• Unsaturated

What type of solution contains more solute than is theoretically possible at a given temperature?

• Saturated

• Unsaturated

• Supersaturated

• Soluble

How many grams of K2SO4 do you need to add to make a saturated solution at 70 degrees Celsius with 10 grams already in 100 grams of water?

• 10 grams

• 40 grams

• 20 grams

• 30 grams

If you have 250 grams of water at 10 degrees Celsius, how many grams of KCl are needed for a saturated solution?

• 25 grams

• 100 grams

• 50 grams

• 75 grams

For a solution of 30 grams of water at 70 degrees Celsius, how many grams of K2SO4 are needed to create a saturated solution?

• 6 grams

• 12 grams

• 3 grams

• 24 grams