Chapter 14, Problem 98A

Interpretation Introduction

Interpretation:

Osmotic pressure is a colligative property have to be explained after defining osmotic pressure.

Concept introduction:

Colligative properties are entirely depend upon the number of solute particles. The colligative properties are valid under the following conditions:

1. The solution must be very dilute.
2. The solute must be non-volatile
3. The solute must be non-electrolyte, i.e., the solute does not undergo any type of dissociation or association.

Answer to Problem 98A

Osmotic pressure is the minimum pressure that must be applied on the solution to prevent the entry of the solvent into the solution through the semi­permeable membrane. Osmotic pressure is a colligative property as it depends on the number of solute particles. Osmotic pressure changes with increasing solute particles in solution.

Explanation of Solution

Osmotic pressure is the minimum pressure that must be applied on the solution to prevent the entry of the solvent into the solution through the semi­permeable membrane. It is also the minimum pressure that needs to apply on a solution to make vapour pressure of the solution equal to vapour pressure of the solvent. Osmotic pressure depends on the number of solute particles. Osmotic pressure changes with increasing solute particles in solution. So, osmotic pressure is a colligative property