Drawing (1)shows the equilibrium vapor pressure of a pure liquid.Which drawing (2)-(5)represents the equilibrium vapor pressure when a nonvolatile solute is dissolved in the liquid?

Question

Quizplus · Accepted Answer

When a nonvolatile solute is added to the liquid, it lowers the vapor pressure of the solution compared to the vapor pressure of the pure solvent. Drawing (3) shows the correct lowering of vapor pressure due to the presence of the solute. Drawing (2) shows a lower vapor pressure, but not low enough to be the correct representation. Drawings (4) and (5) show vapor pressures that are higher than the expected vapor pressure, which is not correct for a solution with a nonvolatile solute.

Drawing (1)shows the Equilibrium Vapor Pressure of a Pure Liquid