Q. The relationship between the values of osmotic pressure of 0.1 M solution of $KNO_{3}\left( p_{1} \right)\$and $CH_{3}COOH(p_{2})$ is
A) $\frac{p_{1}}{p_{1} + p_{2}} = \frac{p_{2}}{p_{1} + p_{2}}$
B) $p_{1} > p_{2}$
C) $p_{2} > p_{1}$
D) $p_{1} = p_{2}\$
Explanation
(b)
KN$O_{3}$ is a strong binary electrolyte. Its van’t Hoff factor is 2. $CH_{3}COOH$ is a very eak electrolyte . Its van’t Hoff factor is less than that for $KNO_{3}.$ Hence osmotic pressure of 0.1 M $KNO_{3}$ (Colligative molarity =0.1 M $\times \$2)
>O.P. of 0.1 M $CH_{3}COOH$
(Colligative molarity is 0.1 M)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.