The percentage dissociation of a salt ( MX 3 ) solution at given temperature (van't Hoff factor i=2 ) is \ \ \ \ \ \% (Nearest integer)

Chemistry · Solutions and Colligative Properties

JEE Main 2025 — 7 April, Morning Shift — Question 18

The percentage dissociation of a salt $\left(\mathrm{MX}_{3}\right)$ solution at given temperature (van't Hoff factor $i=2$ ) is $\_\_\_\_\_$ % (Nearest integer)

Answer: 33

Numerical answer — enter this value.

Step-by-step solution

\text{MX}_3 \rightarrow \text{M}^{3+} + 3\text{X}^-

\begin{array}{lccc} \text{Initial:} & 1 & 0 & 0 \\ \text{Change:} & - \alpha & + \alpha & + 3\alpha \\ \text{Equilibrium:} & 1 - \alpha & \alpha & 3\alpha \end{array}

1 + 3\alpha = 2

\alpha = 33.33\%

Answer key and solution verified before publishing.

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Exam: JEE Main 2025
Paper: 7 April, Morning Shift
Subject: Chemistry
Chapter: Solutions and Colligative Properties
Topic: Abnormal Colligative Properties - van't Hoff Factor