Question
Why is Van’t Hoff factor introduced in the equation for colligative properties of solutions?
Solution
van’t Hoff factor modifies the equations for colligative
properties as follows:
Relative lowering of vapour pressure of solvent,
Elevation of Boiling point, ΔTb = i Kb m
Depression of Freezing point, ΔTf = i Kf m
Osmotic pressure of solution, Π = i n2 R T / V
thus it shows that van't hoff factor depend on solute such that it is a colligative properties.
