A Solution Is Prepared by Dissolving 7

A solution is prepared by dissolving 7.00 g of glycerin (C₃H₈O₃) in 201 g of ethanol (C₂H₅OH) . The freezing point of the solution is ________°C. The freezing point of pure ethanol is -114.6 °C. The molal freezing point depression constant (K_f) for ethanol is 1.99 °C m^-1. The molar masses of glycerin and of ethanol are 92.1 g mol^-1 and 46.1 g mol^-1, respectively.

A) -121.3
B) 0.752
C) -107.9
D) -113.8
E) -115.4

Correct Answer:

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