Glycerol, C3H8O3 (molar mass = 92.09 g/mol, bp = 290 °C) is

Last updated: 7/30/2022

Glycerol, C3H8O3 (molar mass = 92.09 g/mol, bp = 290 °C) is present in all lipids known as triglycerides. (i) What is the vapor pressure of a solution made by adding 164.0 g glycerol to 338 mL H₂O at 39.8°C? The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.992 g/mL. (Hint: Glycerol's boiling point of 290°C is very high compared to the boiling point of water. So, is glycerol a volatile liquid?) (ii) Would you expect the boiling point of this solution to be higher or lower than that of pure water? Concisely explain why. (iii) What is the freezing point of this solution? The Ky value of H₂O is 1.86 °C/m.