8. Calculate the freezing and boiling point of a solution of 28.2 g sodium acetate (NaC2H3O2) in 250 g of water. For water Kf = 1.86 oC/m and Kb = 0.52 oC/m.

9. A solution contains a mixture of cyclohexane (C6H12) and hexane (C6H14) at room temperature. The solution has a vapor pressure of 98.3 torr. Pure cyclohexane has a vapor pressure of 77.5 torr and pure hexane has a vapor pressure of 124 torr at 20 oC. Assuming ideal behavior, what is the mole fraction of cyclohexane and the mole fraction of hexane.