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Freezing Point Depression

Depression of the Freezing Point of a Solvent

We need two pieces of information to calculate the depression of the freezing point of the solvent in a solution containing a nonvolatile nonelectrolyte:

We use the following equation to calculate a freezing point depression. (Note: This equation assumes the freezing point depression constant has a positive value.)

Equation for calculating freezing point depression

Freezing Point of a Solution

The freezing point of the solvent in a solution containing a nonvolatile nonelectrolyte, Tsolution, may be found from the following information:

Equation for the boiling point of a solution

Note: The freezing point of a solution will always be lower than the freezing point of the pure solvent.

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