Freezing points and molality Quantitatively, the freezing-point depression Delta

Question

Freezing points and molality Quantitatively, the freezing-point depression Delta Tf of a solution is related to the molality m and the freezing-point-depression constant Kf of the solvent by the equation Delta Tf = Kf m where the freezing-point depression is the difference between the freezing points of the pure solvent and the solution. A solution of water (Kf = 1.86 degree C/m) and glucose freezes at - 3.35 degree C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 degree C. Express the molal concentration numerically.

Explanation / Answer

dTf=Kf*m,,,,,,,,,,,,,,,,,,,, 3.35=1.86*m,,,,,,,,,,,, molality= 1.8 m

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