Question

A solute 'A' undergoes association in a medium as

$nA \rightleftharpoons A_{n}$

The degree of association is $'\alpha '$ , then van't Hoff factor may be give as

• A. $i=1-\alpha $
• B. $i+1+\frac{\alpha }{n}$
• C. $i=\frac{1 - \alpha + \frac{\alpha }{n}}{1}$
• D. i = 1

Answer 1

Answer: (C)

In case of association, $\alpha $ and i can be related as follows

$\alpha =\frac{1 - i}{1 - \frac{1}{n}}$

So $i=\frac{1 - \alpha + \frac{\alpha }{n}}{1}$