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When 15.0 g of ethyl alcohol, C2H5OH, is dissolved in 750 g of formic acid, the freezing point of the solution is 7.20 C. The freezing point of the pure formic acid is 8.40 C. Evaluate Kf for fomic acid.

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-1.2=Kf m

m= 15/(molmassEthanol*.765)

2.76¡ãcm-1

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