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    Properties of Solutions: Colligative Properties

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    Properties of Solutions

    1. Anthraquinone contains only carbon, hydrogen and oxygen and has an empirical formula of C7H4O. The freezing point of camphor is lowered by 22.3oC when 1.32 g of antraquinone is dissolved in 11.4 g of camphor. Determine the molecular formula of anthraquinone. ( Kf for camphor is 40.0).

    2. A solution is prepared by mixing 25 ml of C5H12 ( density = 0.63 g/ml) and 45 ml of C6H14 ( density = 0.66 g/ml). Assume that the volumes add on mixing, calculate for C5H12
    a) mass %
    b) mole fraction
    c) molality
    d) molaroty.

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    Solution Preview

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    1. Anthraquinone contains only carbon, hydrogen and oxygen and has an empirical formula of C7H4O. The freezing point of camphor is lowered by 22.3oC when 1.32 g of antraquinone is dissolved in 11.4 g of camphor. Determine the molecular formula of anthraquinone. ( Kf for camphor is 40.0)

    A solution of anthraquinone in camphor is non-ionic (both are non-electrolytes), i = 1,
    for camphor Kf = 40.ºC-kg/mol
    ΔT = i x Kf ...

    Solution Summary

    The solution discusses the properties of solutions regarding the colligative properties.

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