The correct expression for osmotic pressure of the solution involving dissociation of the solute is
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → $π=\frac{in_2RT}{V}$
For solutions involving dissociation of the solute, the osmotic pressure must include the van’t Hoff factor (i).
The correct formula is:
$\pi = i \frac{n_2 RT}{V}$
where
- $i$ = van’t Hoff factor
- $n_2$ = number of moles of solute
- $R$ = gas constant
- $T$ = absolute temperature
- $V$ = volume of solution