Chemistry

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A solution made from .650g of an unknown compound in 27.8 g of diphenyl gave a freezing-point depression of 1.56 degrees C. Calculate the molality of the solution. (Kf for diphenyl is 8 degrees C/m)

  • Chemistry -

    delta T = Kf*molality

  • Chemistry -

    delta T = Kf x M x i

    we have i =1 ..1 particle
    Kf = 8
    delta T =1.56

    so m = delta T / Kf x i

    = 1.56 / 8

    = 0.195 m

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