First slide

Theory of dilute solutions

Question

0.2 M aq. solution of KCl is isotonic with 0.2 M K₂SO₄ at same temperature.
What is the van't Hoff factor of K₂SO₄?

Moderate

Solution

$\begin{array}{l} π_{KCl} = π_{K_{2} {SO}_{4}} \\ 0 .2 \times 2 = 0 .2 \times x \\ x = 2 \end{array}$

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