Question

How molecular mass and colligative properties affected when solute undergoes association and dissociation?​

Answer 1

Answer:

Dissociation of Solute Particles:

This leads to increase in solute particles in the solution, thereby increase in colligative properties of solutions. As colligative properties and molecular mass of solute varies inversely, we get a lower molar mass of the solute.

Association of Solute Particles :

The solute particles displace some solvent molecules in the liquid phase and therefore reduce the concentration of solvent, so that the colligative properties are independent of the nature of the solute. ... Colligative properties include: Relative lowering of vapour pressure. Elevation of boiling point.