Question

Ethylene glycol, formula C2H6O2, is used as antifreeze for automobiles and is sometimes mixed with water at a 1:1 ratio by volume and produces a solution with a density of 1.07 g/mL. Assume that the solution behaves ideally. Notes: at 25 oC the densities of water and ethylene glycol are 1.00 g/mL and 1.11 g/mL, respectively, the vapor pressures of water and ethylene glycol at 20 oC are 17.54 torr and 0.06 torr, respectively, and Kb and Kf of water are 0.51 K/m and 1.86 K/m, respectively.

a. What is the freezing point of this solution?

b. What is the vapor pressure, in torr, of this solution at 20 oC?

c. What is the osmotic pressure, in atm, of this solution at 25 oC and 0 oC?

d. What is the mass percent (m/m)% of this solution?

Answer 1