Question: What is the freezing point depression of a solution containing 1 mole of solute in 1 kg of water? (Kf for water = 1.86 °C kg/mol) (2020)

Options:

1. 1.86 °C
2. 3.72 °C
3. 0.93 °C
4. 2.78 °C

Correct Answer: 1.86 °C

Exam Year: 2020

Solution:

Freezing point depression = Kf * m = 1.86 °C kg/mol * 1 mol/kg = 1.86 °C.