Question

A solute X when dissolved in a solvent associates to form a pentamer. The value of van’t Hoff factor (i) for the solute will be

• A. $0.5$
• B. 5
• C. $0.2$
• D. $0.1$

Answer 1

Answer: (C)

$0.2$

Answer 2

$5A \rightarrow A_{5}$

$i = 1 - \left( 1 - \frac{1}{n} \right) = 1 - \left( 1 - \frac{1}{5} \right) = 0.2$