Q. 434.0( 5 Votes )

Why is the vapour

Answer :

In the pure water solvent, the molecules present on the surface are only of water and the vapour pressure exerted is from the solvent molecules. When a non-volatile solute is dissolved in water such as glucose, the vapour pressure exerted on the solution is only from solvent molecules. Due to the glucose dissolving in water, a fraction of molecules covering the surface of water are occupied by glucose molecules. The presence of the solute molecules prevents the escape of solvent molecules from the surface into the vapour phase, hence the vapour pressure of an aqueous solution of glucose is lower than water.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

State Henry’s LawChemistry - Board Papers

Using Raoult’s laChemistry - Exemplar

Note: In the follChemistry - Exemplar

When 1 mol of NaCChemistry - Exemplar

Components of a bChemistry - Exemplar