Question

Colligative properties, determination of the freezing point of a nonelectrolyte, unknown solution.

1. What is the freezing point depression for the unknown, nonelectrolyte solution?
2. How do you determine the molar mass of the unknown, nonelectrolyte compound for each trial, and what is the average molar mass for the unknown compound?

Please help me figure this out? We performed experiment with the solution in a tube suspended in a bath of ice water and mixed solution/observed for freezing. Here is the data I collected, please tell me if something is missing?

Trial 1:
20mL water, 1.005g unknown
solution initial temp: 10.18 degrees C. observed freezing point of solution: -2.42 degrees C.
Observed freezing point of water: -0.84 degrees C.

Trial 2:

21 mL water, 1.001g unknown
solution initial temp: 17.73 degrees C. observed freezing point of solution: -2.09 degrees C
Observed freezing point of water: -0.85 degrees C

Answer 1

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