Determine the molal concentration of a sugar solution in water that has a freezing point of -2.1°C. K_f = 1.86°C/m for water. A) 1.13 m B) -1.13 m C) 3.91 m D) -3.91 m E) 0.113 m

Question

Quizplus · Accepted Answer

The freezing point depression formula is ΔTf = i * Kf * m, where ΔTf is the change in freezing point, i is the van't Hoff factor (1 for sugar), Kf is the freezing point depression constant, and m is the molality. Solving for m: m = ΔTf / Kf = 2.1°C / 1.86°C/m = 1.13 m.

Determine the Molal Concentration of a Sugar Solution in Water