Question

How does Solute affect Boiling Point?

Answer 1

The effect of solute on boiling point:

1. Boiling Point is the temperature at which the vapour pressure is equal to the atmospheric pressure.
2. If the concentration of solute is higher, then the boiling point will also be higher.
3. Boiling point elevation is explained as when a non-volatile solute is added in the solvent, then the vapour pressure of the solution becomes lower than the vapour pressure of pure solvent. As a result, the boiling point of the solution becomes higher than the boiling point of the pure solvent.

4. Due to the high concentration of solute the surface is crowded with the solute molecules, which makes it difficult for the solvent molecule to escape out.

Thus, boiling will be higher due to a high concentration of solute.