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March 28, 2017

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What is the freezing point of a solution of 1.17g of 1-naphthol, C10H8O, dissolved in 2.00ml of benzene at 20 degrees C? The density of benzene at 20 degrees C is 876g/ml. Kf for benzene is 5.12 degrees C/m, and benzene's normal freezing point is 5.53 degrees C.

  • Chemistry - ,

    moles = grams/molar mass
    Solve for moles.

    molality = moles/kg solvent
    Solve for molality.

    delta T = kf*m
    Solve for delta T and convert to freezing point.
    You will need to use density to convert from volume to grams or kg.

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