What would be the freezing point of a 1 m solution of HCl in water (K_f= 1.86°C)? A) 0.0°C B) -1.86°C C) -3.72°C D) 1.86°C E) -0.93°C

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Quizplus · Accepted Answer

The freezing point depression is calculated using the formula ΔTf = i * Kf * m, where i is the van't Hoff factor (2 for HCl, as it dissociates into H+ and Cl-), Kf is the freezing point depression constant, and m is the molality. Therefore, ΔTf = 2 * 1.86°C * 1 m = 3.72°C. The freezing point of pure water is 0°C, so the freezing point of the solution is 0°C - 3.72°C = -3.72°C.

What Would Be the Freezing Point of a 1 M