Question

Why is the magnitude of a colligative property for a colloidal solution much smaller than that obtained for a true solution?

Answer 1

The magnitude of a colligative property for a colloidal solution is much smaller than that for a true solution because colloidal particles exist as aggregates. For the same mass of solute, the number of colloidal particles in a colloidal solution is far fewer than the number of particles in a true solution. Since colligative properties depend on the number of solute particles, this reduced particle count leads to much smaller colligative effects in colloidal solutions compared to true solutions.