Vapor Pressure Lowering The vapor pressure of a pure solvent is REDUCED when a nonvolatile solute is added. This is summarized by Raoult's Law: Psolution Xsolvent Posolvent Where: Psolution is the vapor pressure of the solution Xsolvent is the mole fraction of the solvent in the solution (mol solvent)/(mol solvent + mol solute) Po solvent is the vapor pressure of the pure solvent As more solute particles are added, the mole fraction of the solvent goes down, and the vapor pressure is reduced. The vapor pressure of benzene is 73.03 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in benzene is cholesterol. Calculate the vapor pressure of the solution at 25 °C when 11.47 grams of cholesterol, C27H460 (386.6 g/mol), are dissolved in 169.0 grams of benzene. benzene C6H6 = 78.12 g/mol. VP(solution) = Submit Answer mm Hg Retry Entire Group 2 more group attempts remaining
Vapor Pressure Lowering The vapor pressure of a pure solvent is REDUCED when a nonvolatile solute is added. This is summarized by Raoult's Law: Psolution Xsolvent Posolvent Where: Psolution is the vapor pressure of the solution Xsolvent is the mole fraction of the solvent in the solution (mol solvent)/(mol solvent + mol solute) Po solvent is the vapor pressure of the pure solvent As more solute particles are added, the mole fraction of the solvent goes down, and the vapor pressure is reduced. The vapor pressure of benzene is 73.03 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in benzene is cholesterol. Calculate the vapor pressure of the solution at 25 °C when 11.47 grams of cholesterol, C27H460 (386.6 g/mol), are dissolved in 169.0 grams of benzene. benzene C6H6 = 78.12 g/mol. VP(solution) = Submit Answer mm Hg Retry Entire Group 2 more group attempts remaining
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter13: Solutions And Their Behavior
Section: Chapter Questions
Problem 75GQ: If a volatile solute is added to a volatile solvent, both substances contribute to the vapor...
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