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  4. The van’t Hoff factor of 0.005 M aqueous solution of KCl is 1.95. The degree of ionisation of KCl is

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Q. The van’t Hoff factor of $0.005 \,M$ aqueous solution of $KCl$ is $1.95$. The degree of ionisation of $KCl$ is

Solutions

Solution:

$KCl \rightleftharpoons K^{+} + Cl^{-} \,\left(n = 2\right)$
$\alpha = \frac{i-1}{n-1} = \frac{1.95-1}{2-1} = 0.95$