What is the molarity of a solution of methanol in water in which the m – InterviewSolution

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1.

What is the molarity of a solution of methanol in water in which the mole fraction of methanol is 0.25.

Answer»

1 mole of solution contains 0.25 mol of methanol and 1 – 0.25 = 0.75 mol of water.

Mass of water = 0.75 x 18 = 13.5

Molality of methanol solution = Moles of Methanol/ Mass of solvent x 1000 0.25/13.5 x 100 = 18.5 m

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