Engineering
Chemistry
Depression in Freezing Point
Question
Molal depression constant for a solvent is 4.0 K kg mol–1. The depression in the freezing point of the solvent for 0.03 mol kg–1 solution of K2SO4 is :
(Assume complete dissociation of the electrolyte)
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Solution
Kf = 4 K Kg mol–1
i = 3
Molality = 0.03
Tf = i Kfm
= 3(4) (0.03)
Tf = 0.36 K