Question

Why is the osmotic pressure considered to be a colligative property?

Show that osmotic pressure is a colligative property.

Answer 1

Osmotic pressure is considered a colligative property because it depends only on the number of solute particles (i.e., the concentration of the solute) and not on their nature.

Osmotic pressure (π) = CRT

Where:

π = osmotic pressure

C = molar concentration of solute

R = gas constant

T = temperature (in Kelvin)

This shows that osmotic pressure is directly proportional to the number of solute particles in a given volume of solution.