A student determines the molar mass of methanol, CH 3OH, by the method used in t

Question

A student determines the molar mass of methanol, CH 3OH, by the method used in this experiment. She found that the equilibrium temperature of a mixture of ice and pure water was 0.4C on her thermometer. When she added 10.0 g of her sample to the mixture, the temperature, after thorough stirring, fell to ?5.4C. She then poured off the solution through a screen into a beaker. The mass of the solution was 101.8 g. a. What was the freezing point depression? ______________ C b. What was the molality of the methanol? ______________ m c. How much methanol was in the decanted solution? ______________ g d. How much water was in the decanted solution? ______________ g e. How much methanol would there be in a solution containing 1 kg of water, with methanol at the same concentration as she had in her experiment? ______________ g methanol f. What did she find to be the molar mass of methanol, assuming she made the calculation properly? ______________ g

Explanation / Answer

This may be a dumb question, but where are you getting acetone from? It never states acetone in the question nore CH3COH. It does state CH3OH howerver. Doing that throws off all your calculations for molar mass.

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