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The freezing point is measured again after a known mass of an unknown solid solute is added to the solvent. Calculation of ΔTfcap delta cap T sub f : This is the change in freezing point, calculated as:

The lab report (often listed as Experiment 14 in chemistry courses) is a common laboratory exercise used to determine the molar mass of an unknown substance through freezing point depression , a colligative property. Key Components of the Report

Solved Experiment 14 Report Sheet Molar Mass of a Solid Date

Usually, cyclohexane is used as the solvent. Its pure freezing point is recorded from a cooling curve.

The final result is found by dividing the mass of the solute used by the number of moles calculated. Typical Lab Report Values

A solid lab report for this experiment typically includes the following data sections and calculations: