A quantity of 212.0 g of an aqueous solution of solute (molar mass 50.0 g) having solute mole fraction to be 0.1 is reduced to 180.0 g on evaporation and simultaneously 14.0 g of solute crystallizes o

Question

A quantity of 212.0 g of an aqueous solution of solute (molar mass 50.0 g) having solute mole fraction to be 0.1 is reduced to 180.0 g on evaporation and simultaneously 14.0 g of solute crystallizes out. The molality of the saturated solution left over is:

Prashant Kotian · Accepted Answer

Correct answer: D. Let mass of solute = x g, mass of water = (212 – x) g Then x / 50

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