The vapour pressure of 2% solution of a non -volatile substance X at 373K is 755 torr calculate the molar - Chemistry - Solutions

Question

The vapour pressure of 2% solution of a non -volatile substance X
at 373K is 755 torr calculate the molar mass of the solute Vapour
pressure of pure water at 373K is 760 torr

Geetha · Accepted Answer

According to lowering of vapour pressure,P0 - PP0 = W2M2 × M1W1760 -755760 = 2M2 × 1898M2 = 2 × 18 × 7605 × 98 = 55
84 g

The vapour pressure of 2% solution of a non -volatile substance X at 373K is 755 torr.calculate the molar mass of the solute .Vapour pressure of pure water at 373K is 760 torr.