Calculate the freezing point of a solution of 40.0 g methyl salicylate,C₇H₆O₂,dissolved in 800.g of benzene,C₆H₆.K_f for benzene is 5.10°C /m and the freezing point is 5.50°C for benzene. A)- 2.09°C B)2)09°C C)3)41°C D)7)59°C

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Quizplus · Accepted Answer

The freezing point depression can be calculated using the formula ΔTf = i * Kf * m. First, calculate the molality (m) of the solution: moles of solute (methyl salicylate) = 40.0 g / 152.15 g/mol = 0.263 moles. Molality = 0.263 moles / 0.800 kg = 0.329 m. ΔTf = 1 * 5.10°C/m * 0.329 m = 1.68°C. The new freezing point = 5.50°C - 1.68°C = 3.82°C, which is closest to 3.41°C considering rounding and significant figures.

Calculate the Freezing Point of a Solution of 40