Question

What is relative lowering of vapour pressure ?how can lowering of vapour pressure be measured using static method.

Answer 1

Vapor pressure lowering is a colligative property of solutions. The vapor pressure of a pure solvent is greater than the vapor pressure of a solution containing a non volatile liquid. This lowered vapor pressure leads to boiling point elevation.

In the static methods the vapour pressure is directly measured, such as barometric method and manometric method.