The vapour pressure of a solution of a non volatile electrolyte(A) in a solvent(B) is 95% of vapour pressure of - Chemistry - Solutions

Question

The vapour pressure of a solution of a non volatile electrolyte(A)
in a solvent(B) is 95% of vapour pressure of solvent at the same
temp If MB = 0 3 MA where MB &
MA are molecular wts of B & A resp, what is the
weight ratio of solvent & solute?

Geetha · Accepted Answer

Relative lowering of vapour pressure is∆PP0 = wMWmwhere∆P - lowering of vapour pressureP0 - Vapour pressure of pure solventw- weight of soluteM- molecular weight of the solventm= molecular weight of soluteW =  weight of solvent100-95100 = wW × 0
3 MAMAwW = 5100× 0
3 = 16Weight of solute to solvent = 16weight of solvent to solute = 61

The vapour pressure of a solution of a non volatile electrolyte(A) in a solvent(B) is 95% of vapour pressure of solvent at the same temp. If MB = 0.3 MA where MB & MA are molecular wts. of B & A resp, what is the weight ratio of solvent & solute?

The vapour pressure of a solution of a non volatile electrolyte(A) in a solvent(B) is 95% of vapour pressure of solvent at the same temp. If M_B = 0.3 M_Awhere M_B & M_A are molecular wts. of B & A resp, what is the weight ratio of solvent & solute?