Q. 11

A solution is pre

Answer :


Vapour pressure of pure water i.e. solvent, P° = 32 mm Hg

Vapour pressure of solution (i.e. after addition of solute into solvent), P = 31.84mmHg

W1, mass of solvent= 200g

W2, mass of solute = 10g

M1, molecular weight of solvent i.e. water = 18 gmol-1

M2, molecular weight of solute =?

According to relative lowering of vapour pressure,



M2 =

M2 = 180 gmol-1

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