Calculation of Molal Freezing Point Depression Constant


1.60 g of naphthalene (C10H8) is dissolved in 20.0 g of benzene. The freezing point of pure benzene is 5.5 oC, and the freezing point of the mixture is 2.8 oC. What is the molal freezing point depression constant, Kf of benzene?


  1. Step 1: Calculate the freezing point depression of benzene.

  2. Step 2 : Calculate the molal concentration of the solution.

  3. Step 3: Calculate Kf of the solution.

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