Colligative Properties of Solutions
Chemistry ⇒ Solutions and Colloids
Colligative Properties of Solutions starts at 11 and continues till grade 12.
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Define the term 'colligative property'.
Describe the effect of association and dissociation of solute particles on colligative properties.
Describe the effect of temperature on the magnitude of colligative properties.
Explain the term 'hypertonic solution' in the context of osmosis.
A 0.1 molal solution of a non-electrolyte in benzene lowers the freezing point by 0.512 K. If Kf for benzene is 5.12 K kg mol-1, calculate the molar mass of the solute if 1 g is dissolved in 100 g benzene.
A 0.2 molal solution of a non-electrolyte in water has a freezing point depression of 0.372°C. If Kf for water is 1.86 K kg mol-1, calculate the expected freezing point of the solution.
A 0.2 molal solution of K2SO4 is prepared. Assuming complete dissociation, what is the van't Hoff factor (i)?
A solution containing 0.1 mol of NaCl in 1 kg of water freezes at -0.372°C. Calculate the van't Hoff factor (Kf for water = 1.86 K kg mol-1).
Which colligative property is most suitable for determining the molar mass of a polymer? (1) Boiling point elevation (2) Freezing point depression (3) Osmotic pressure (4) Vapour pressure lowering
Which of the following is NOT a colligative property? (1) Boiling point elevation (2) Freezing point depression (3) Osmotic pressure (4) Viscosity
Which of the following is NOT a method to determine molar mass using colligative properties? (1) Freezing point depression (2) Boiling point elevation (3) Osmotic pressure (4) Surface tension
Which of the following is NOT a requirement for a property to be colligative? (1) It must depend on the number of solute particles. (2) It must depend on the nature of solute. (3) It must be independent of the chemical identity of solute. (4) It must be measurable in dilute solutions.
Colligative properties depend on the _______ of solute particles and not their nature.
Osmotic pressure is a _______ property.
The depression in freezing point is proportional to the _______ of the solution.
The osmotic pressure of a solution is given by the formula _______.
True or False: The addition of a non-volatile solute to a solvent increases the vapour pressure of the solvent.
True or False: The addition of a volatile solute to a solvent always lowers the vapour pressure of the solution.
True or False: The boiling point of a solution is always higher than that of the pure solvent.
True or False: The elevation in boiling point is directly proportional to the molality of the solution.
