3: Classification of Solutions

Multiple Choice

What factors determine the solubility of a substance in water?

• Amount of solute dissolved and temperature

• Pressure and volume

• Type of container and stirring speed

• Color and taste

Multiple Choice

Which of the following statements best describes the relationship between temperature and the solubility of solids in water, as shown in the solubility curve for KNO3?

• Solubility decreases as temperature increases.

• Solubility remains constant as temperature increases.

• Solubility increases as temperature increases.

• Solubility first increases then decreases with temperature.

Multiple Choice

Based on the solubility curves, which solute's solubility is least affected by temperature changes?

• NaNO3

• KNO3

• NaCl

• NH4Cl

Open Ended

Explain why the solubility of gases in water generally increases as temperature decreases, using the example of Ce2(SO4)3.

Multiple Choice

According to Henry's Law, how does increasing pressure affect the solubility of a gas at constant temperature and volume?

• Solubility decreases as pressure increases.

• Solubility increases as pressure increases.

• Solubility remains unchanged with pressure.

• Solubility fluctuates randomly with pressure.

Multiple Choice

Which of the following describes a saturated solution of KNO3 at 50°C?

• 50g of KNO3 dissolved in 100g of water

• 90g of KNO3 dissolved in 100g of water

• 120g of KNO3 dissolved in 100g of water

• 10g of KNO3 dissolved in 100g of water

Multiple Choice

Which of the following best describes an unsaturated solution?

• The solvent contains less than the maximum amount of solute at a given temperature.

• The solvent contains more than the maximum amount of solute at a given temperature.

• The solvent contains exactly the maximum amount of solute at a given temperature.

• The solvent contains no solute at all.

Multiple Select

Which of the following statements about supersaturated solutions is correct? Select all that apply.

• A solvent can hold more than the maximum amount of solute at a given temperature if saturated at a higher temperature then slowly cooled.

• Crystals will form if the solution is disturbed.

• Supersaturated solutions are always stable.

• Supersaturated solutions contain less solute than saturated solutions.

Open Ended

Explain how the solubility curve graph helps determine whether a solution is saturated, unsaturated, or supersaturated.

Open Ended

Reflecting on today's lesson about saturation and solubility, what is one real-life example where understanding solubility is important?

Multiple Choice

How does temperature affect the solubility of KNO3 in water according to the solubility curve shown?

• Solubility increases as temperature increases

• Solubility decreases as temperature increases

• Solubility remains constant regardless of temperature

• Solubility decreases and then increases with temperature