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Relative Lowering of Vapour Pressure

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Question

Calculate the freezing point of a solution when 31 gram of Ethylene glycol is dissolved in 500 gram of water. (

Kf for water=1.86 k kg /mol

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Solution

freezing point of water is 273.15k
here ethylene glycol is added with water So freezing point will decrease or increase by a factor Tf. Here Tf is 1.86. So in last we subtracted 1.86 from 273.15k

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