Colligative Properties & Solubility Curves

The boiling point of a solution is ______ the boiling point of the pure solvent.

• higher than
• the same as
• lower than
• higher or lower than

Which technique could increase or speed up the rate of dissolving?

• Allowing the mixture to settle
• Stirring the mixture
• Adding more powder
• Adding more water

The freezing point of a solution is ____ the freezing point of the pure solvent.

• the same as
• lower than
• higher than
• no relation to

Colligative properties depend on the _________ of the solute but not the __________ of the solute.

•  concentration; identity
• identity; concentration
• reactivity; nature
• nature; reactivity

When methanol (CH₃OH) is dissolved in water, how many particles are in solution for each unit?

• 1

• 3

• 4

• 5

• 6

When KCl (potassium chloride) is dissolved in water, how many particles are in solution for each unit?

• 1

• 2

• 3

• 4

• 6

When calcium bromide (CaBr₂)is dissolved in water, how many particles dissociated for each formula unit?

• 1

• 2

• 3

• 4

• 5

If two moles of each solute are added to a liter of water, which salt will have the largest effect on the freezing point?

• C₂H₄O₂

• H₂S

• LiBr

• CaF₂

Colligative properties depend on the _____ of solute particles in solution.

• type
• number
• pH
• nature

Why is it difficult to wash oil from your hands with plain water?

• Both substances are polar. Like polarities repel.

• Both substances are nonpolar. Like polarities repel.

• Water is nonpolar, and oil is polar, so they will not combine.

• Water is polar, and oil is nonpolar, so they will not combine.