To 500cm3 of water, 3.0 × 10-3 kg of acetic acid is added. If 23% of acetic acid is dissociated, what will be the depression in freezing point. If kf and density of water are 1.86 k kg/mole and 0.997 gcm-3 respectively

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0.186 k

0.228 k

0.372 k

0.556 k

answer is B.

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Detailed Solution

n=2 , i = 1+α(n-1) =1 +0.23(2-1) =1.23