2 molal solution of a weak acid HA has a freezing point of 3.885oC. The degree of dissociation of this acid is _________ (Round off to the Nearest Integer). [Given : Molal depression constant of water Freezing point of pure water = 0o C]
Given,
2 molal solution of a weak acid HA has a freezing point of 3.885ºC.
m = 2
Molal depression constant of water (Kf) = 1.85 K kg mol-1
The freezing point of pure water Ti = 0ºC
van't Hoff factor i is related to the degree of dissociation \alpha as, if n = number of ions,
Here n = 2 (H+and A-)
So,
We know the formula of depression at the freezing point.
i = 1.05
Now,
Ans = 50
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