Calculate the vapor pressure of a solution prepared by dissolving 0.500 mol of a non-volatile solute in 275 g of hexane (M = 86.18 g/mol) at 49.6$\degree$C. P $\degree$_hexane = 400.0 torr at 49.6$\degree$C. A) 54 torr B) 154 torr C) 246 torr D) 346 torr E) 400. torr

Question

Quizplus · Accepted Answer

The vapor pressure of the solution is calculated using Raoult's Law: P_solution = X_solvent * P°_solvent. First, calculate the moles of hexane: 275 g / 86.18 g/mol = 3.19 mol. The mole fraction of hexane is 3.19 / (3.19 + 0.500) = 0.864. Thus, P_solution = 0.864 * 400.0 torr = 346 torr.

Calculate the Vapor Pressure of a Solution Prepared by Dissolving °\degree°

Calculate the Vapor Pressure of a Solution Prepared by Dissolving $\degree$