Question
Why is vapour pressure of solution of glucose in water is lower than that of water?
Solution
Answer:
The vapour pressure of pure solvent decrease when a non- volatile solute is added to the solvent this is because on adding the solute, a fewer number of water molecules are present at the surface which can evaporate as some of the surface area is occupied by non- volatile solute molecules thereby decreasing the vapour pressure of the solution thus the vapour pressure of the solution of the glucose in water lower than that of water.
The vapour pressure of pure solvent decrease when a non- volatile solute is added to the solvent this is because on adding the solute, a fewer number of water molecules are present at the surface which can evaporate as some of the surface area is occupied by non- volatile solute molecules thereby decreasing the vapour pressure of the solution thus the vapour pressure of the solution of the glucose in water lower than that of water.
