Colligative Properties

Multiple Choice

Which of the following is NOT a colligative property of a solution?

• Freezing point

• Boiling point

• Osmotic pressure

• Density

Open Ended

Why do you think understanding colligative properties is important in real-life situations?

Multiple Choice

Which of the following is NOT a colligative property of solutions?

• Vapor-pressure lowering

• Boiling-point elevation

• Freezing-point lowering

• Density increase

Open Ended

Explain how the presence of a solute affects the evaporation of a solvent in a solution.

Multiple Select

Which of the following statements about freezing point depression and boiling point elevation are correct?

• 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.

Fill in the Blank

Osmotic pressure (π) is equal to the pressure that, when applied, just stops ___.

Open Ended

Describe the process of osmosis and the role of osmotic pressure in this process.

Multiple Choice

What is the function of the semipermeable membrane in the process of osmosis as shown in the diagram?

• 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.

Multiple Choice

Which of the following is a reason why salt is spread on icy roads?

• 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

Open Ended

How do colligative properties help us understand the behavior of solutions in everyday life?

Multiple Choice

Which of the following is a characteristic of colligative properties?

• 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.

Open Ended

Explain how the addition of solutes to water is applied in real-life situations, such as those mentioned in the slides.

Multiple Choice

The table below gives information about four aqueous solutions at standard pressure.

Which list of solutions is arranged in order from highest boiling point to lowest boiling point?

• 1. A, B, D, C

• 1. A, C, B, D

• 1. C, D, B, A

• 1. D, B, C, A

Multiple Choice

What is the vapor pressure of propanone at 50C?

• 37 kPa

• 50 kPa

• 83 kPa

• 101 kPa

Multiple Choice

Definition of normal boiling point:

• 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

Multiple Choice

What is the boiling point of a solution that contains 7.6 moles of CH4 in 0.850kg of water? Kbp= 0.512 degrees C/m

• 4.58 degrees C

• 100 degrees C

• 104.58 degrees C

Multiple Choice

Which law specifically governs the relative lowering of vapor pressures in solutions?

• a) van’t Hoff law
  

• b) Boyle’s law
  

• c) Raoult’s law
  

• d) Amagat’s law

Multiple Choice

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

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

Multiple Choice

Find the boiling point of a solution containing 15.0 g sucrose (molar mass = 342.3g/mol), in 100g of water. (Kb = 0.512 ^oC/m)

• 100.2

• 99.8

• 0.2

• -0.2

Multiple Choice

When 20 grams of KNO₃ is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:

• supersaturated
• saturated
• unsaturated

Multiple Choice

At which temperature do KBr and KNO3 have the same solubility?

• 60

• 55

• 50

• Never

Multiple Choice

Change of state from a solid to a liquid.

• sublimation
• deposition
• freezing
• melting

Multiple Choice

What kind of change is a phase change?

• Physical - it's still the same substance
• chemical - it's made of chemicals 

Multiple Choice

The steam coming off the pot of boiling water is an example of....

• a solid becoming a liquid
• a liquid becoming a solid
• a liquid becoming a gas
• a gas becoming a liquid

Multiple Choice

When you heat water it turns into a ____

• liquid
• water
• gas
• solid

Multiple Choice

When water vapor gets cold, it turns to a...

• liquid
• solid
• raindrop
• ice