Consequently, the number of
solvent molecules escaping from the surface
is correspondingly reduced, thus, the vapour
pressure is also reduced The decrease in the vapour pressure of solvent depends on the
quantity of non-volatile solute present in the solution, irrespective of
its nature For example, decrease in the vapour pressure of water by
adding 1 0 mol of sucrose to one kg of water is nearly similar to that
produced by adding 1