Chemistry · Solutions

'W' g of a non-volatile electrolyte solid solute of molar mass 'M' g mol−1 when dissolved in 100 mL water, decreases vapour pressure of water from 640 mm Hg to 600 mm Hg. If aqueous solution of the electrolyte boils at 375 K and Kb for water is 0.52 K kg mol−1, then the mole fraction of the electrolyte solute (x2) in the solution can be expressed as: (Given: density of water = 1 g/mL and boiling point of water = 373 K)