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Properties of Solutions: Colligative Properties

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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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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