Question

Calculate the vapor pressure of water above a solution prepared by adding 24.5 g of lactose (C12H22O11) to 200.0 g of water at 338 K. (Vapor-pressure of water at 338 K 187.5 torr.)

Calculate the mass of propylene glycol (C3H8O2) that must be added to 0.350 kg of water to reduce the vapor pressure by 2.87 torr at 40 ∘C (PH2O at 40 ∘C=55.3torr).

Answer 1