Q.

How many grams of sucrose should be dissolved in 100g water in order to produce a solution having difference between the freezing point and the boiling point temperatures at 105.00C ?

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answer is 2.

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Detailed Solution

Given,    Tb - Tf =105ocTb= BP of a solution   ;     Tf = FP of a solutionFor water,                       Kb = 0.52 KKgmole-1    ,      Kf =1.86 KKgmole-1  Given,    Tb - Tf =105oc   Given ,    Wwater=100gmWsucrose = 72.8gm
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