Colligative Properties Quiz

What is the molality effect?

• The molality effect is the change in color of a solution.

• The molality effect is the change in pH of a solute.

• The molality effect is the change in viscosity of a solvent.

• The molality effect is the change in boiling or freezing point of a solvent due to the presence of a solute.

Define molarity and provide an example.

• Molarity is a measure of the concentration of a solute in a solution, expressed as the number of moles of solute per liter of solution. For example, a solution containing 0.5 moles of NaCl dissolved in 1 liter of water has a molarity of 0.5 M.

• A solution with a molarity of 0.5 M has a higher concentration than a solution with a molarity of 1 M.

• A molarity of 1 M means there is 1 mole of solute in 1 milliliter of solution.

• Molarity is a measure of the volume of a solution, expressed in liters.

How is mol fraction calculated?

• Mole fraction = Moles of component - Total moles of all components

• Mole fraction = Moles of component / Moles of all components

• Mole fraction = Moles of component / Total moles of all components

• Mole fraction = Moles of component x Total moles of all components

Explain how molality affects colligative properties.

• Molality decreases the boiling point of a solution

• Molality reduces the osmotic pressure of a solution

• Molality has no effect on colligative properties

• Molality affects colligative properties by increasing the number of solute particles in a solution, which in turn enhances the impact of those properties.

Calculate the molality of a solution containing 10g of solute (Mr = 120,5) and 100g of solvent.

• 1.25 m

• 0.83 m

• 2.00 m

• 0.50 m

If a solution has a mol fraction of 0.3 for a solute, what is the mol fraction of the solvent?

• 0.8

• 0.5

• 0.7

• 0.2

How does molarity differ from molality?

• Molarity and molality are the same and can be used interchangeably.

• Molarity is the concentration of a solution expressed as the number of moles of solvent per liter of solution.

• Molality is the concentration of a solution expressed as the number of moles of solute per liter of solvent.

• Molarity is the concentration of a solution expressed as the number of moles of solute per liter of solution, while molality is the concentration of a solution expressed as the number of moles of solute per kilogram of solvent.

Why are colligative properties important in chemistry?

• Colligative properties are important because they are only applicable to gases

• Colligative properties are important because they are affected by the color of the solute

• Colligative properties are important because they are independent of the concentration of the solute

• Colligative properties are important in chemistry because they depend only on the number of solute particles in a solution, not on the nature of the solute.

What is the mol fraction of water in a solution containing 20g of water and 30g of ethanol (Mr = 46)?

• 0.37

• 0.63

• 0.33

• 0.56

How does adding a solute affect the boiling point of a solvent?

• Adding a solute to a solvent increases the boiling point of the solvent.

• Adding a solute to a solvent has no effect on the boiling point of the solvent.

• Adding a solute to a solvent makes the boiling point of the solvent unstable.

• Adding a solute to a solvent decreases the boiling point of the solvent.