Adding a nonvolatile solute to a solution decreases the vapor pressure of the solution.

Name: Adding a nonvolatile solute to a solution decreases the vapor pressure of the solution.
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Quizplus · Accepted Answer

This is known as Raoult's law, which states that the vapor pressure of a solution is proportional to the mole fraction of the solvent present. When a nonvolatile solute is added, it occupies space in the solution, decreasing the mole fraction of the solvent and therefore decreasing the vapor pressure of the solution.

Adding a Nonvolatile Solute to a Solution Decreases the Vapor