JEE Main 2022 — Solutions Question with Solution
From: JEE Main 2022 (Online) 29th June Morning Shift
Question
1.2 mL of acetic acid is dissolved in water to make 2.0 L of solution. The depression in freezing point observed for this strength of acid is 0.0198C. The percentage of dissociation of the acid is ___________. (Nearest integer)
[Given : Density of acetic acid is 1.02 g mL1, Molar mass of acetic acid is 60 g mol1, Kf(H2O) = 1.85 K kg mol1]
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Show full solutionCorrect answer: 5
Step-by-step explanation
Moles of solute acetic acid
As moles of solute are very less.
So, take molarity and molality the same.
\alpha=\frac{i-1}{n-1}=\frac{0.05}{1}= 0.05 = 5\text{%}
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