The Macroscopic ViewWhen a solute i

The Macroscopic View

When a solute is added to a solvent, the vapor pressure of the solvent (above the resulting solution) is less than the vapor pressure above the pure solvent. The boiling point of a solution, then, will be greater than the boiling point of the pure solvent because the solution (which has a lower vapor pressure) will need to be heated to a higher temperature in order for the vapor pressure to become equal to the external pressure (i.e., the boiling point).

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The Macroscopic View When a solute is added to a Solvent, the pressure of the Solvent Vapor (above the resulting Solution) is less than the pressure above the Pure Solvent Vapor. The boiling point of a solution, then, will be greater than the boiling point of the pure solvent because the solution (which has a lower vapor pressure) will need to be heated to a higher temperature in order for the vapor pressure to become equal to. the external pressure (ie, the boiling point).