Molal depression constant for a solvent is 4.0 K kg mol-1. Calculate the depression in the freezing point (in K) of the solvent for 0.03 mol kg-1solution K2SO4.(Assume complete dissociation of the electrolyte)

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answer is 0.36.

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Detailed Solution

Dissociation of Potassium Sulphate (K2SO4)K2SO4⟶2 K++SO42-i (van't Hoff factor) = 3We known that ΔTf=i Kfm where, kf is molal depression constant and m is molarity. ∴ΔTf=3×4×0.03=0.36 K

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