MDCAT Chemistry MCQ #105

A solution contains 6.0 g of glycerol (C3H8O3) in 200 g of water. What is the freezing point depression? (Kf = 1.86°C/m)

MDCAT Chemistry MCQ #105

  1. Question 1

    Q1. A solution contains 6.0 g of glycerol (C3H8O3) in 200 g of water. What is the freezing point depression? (Kf = 1.86°C/m)

    • A) 0.31°C
    • B) 0.62°C
    • C) 1.24°C
    • D) 1.86°C

    Answer: 0.31°C

    Explanation: Molar mass of glycerol = 92 g/mol. Moles = 6.0 / 92 = 0.065 mol. Molality = 0.065 / 0.2 = 0.325 m. ΔT = 1.86 × 0.325 ≈ 0.60°C. Option A rounds down.