Question

Two solutions of $KN{O}_3$ and $C{H}_{3}COOH$ are prepared seperately.The molarity of both is $0.1M$ and osmotic pressure is $P_1$ and $P_2$, respectively.
The correct relationship between the osmotic pressure is :

• A. $P_2>P_1$
• B. $P_1=P_2$
• C. $P_1>P_2$
• D. $\frac{P_1}{P_1+P_2}=\frac{P_2}{P_1+P_2}$

Answer 1

The correct option is C $P_1>P_2$

As we know, Elevation in boiling point,osmotic pressure,depression in vapour pressure, and depression in freezing point are colligative properties.
Colligative properties are properties of solution which depend on the number of particles present in solution.
$KN{O}_3$ is 100% ionized while $C{H}_{3}COOH$ is a weak electrolyte so more no of ions will show more pressure.