2 molal solution of a weak acid HA has a freezing point of 3 . 885 ° C . The degree of dissociation of…

2 molal solution of a weak acid HA has a freezing point of 3.885°C. The degree of dissociation of this acid is ______×10-3. (Round off to the Nearest Integer). [Given : Molal depression constant of water =1.85 K kg mol-1 Freezing point of pure water=0°C

Solution

ΔTf=(1+α)Kf×m3.885 = (1+α)×1.85 ×2

α=0.05=50×10-3

Asked in: JEE Main 2021 (18 Mar Shift 1)

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