Colligative Properties

Freezing point

Boiling point

Osmotic pressure

Density

Vapor-pressure lowering

Boiling-point elevation

Freezing-point lowering

Density increase

The freezing point of a solution is higher than that of the pure solvent.

The boiling point of a solution is higher than that of the pure solvent.

The freezing point of a solution is lower than that of the pure solvent.

The boiling point of a solution is lower than that of the pure solvent.

It allows solute particles to pass through but not solvent molecules.

It allows solvent molecules to pass through but not solute particles.

It prevents both solvent and solute particles from passing through.

It allows both solvent and solute particles to pass through freely.

To increase the boiling point of water

To melt the ice by lowering the freezing point

To make the roads rougher

To prevent rust on vehicles

They depend on the number of dissolved solute particles.

They depend on the type of solute particle.

They are the same as the properties of the solvent.

They do not affect freezing or boiling points.

1. A, B, D, C

1. A, C, B, D

1. C, D, B, A

1. D, B, C, A

37 kPa

50 kPa

83 kPa

101 kPa

The boiling point of a substance at an elevation of 8,000

The boiling point of a substance of 0.61 atm

The boiling point of a substance at standard pressure

The boiling point at the most highest elevation available

4.58 degrees C

100 degrees C

104.58 degrees C

a) van’t Hoff law

b) Boyle’s law

c) Raoult’s law

d) Amagat’s law

100.2

99.8

0.2

-0.2

60

55

50

Never