In order to find the molar mass of an unknown compound, a research scientist prepared a solution of 0.930 g of an unknown in 125 g of a solvent. The pure solvent had a freezing point of 74.2oC, and the solution had a freezing point of 73.4o Given the solvents freezing point depression constant, Kf =5.50oC/m, find the molar mass of the unknown.

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Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter15: Principles Of Chemical Reactivity: Equilibria

Section15.6: Disturbing A Chemical Equilibrium

Problem 2.1ACP: Freezing point depression is one means of determining the molar mass of a compound. The freezing...

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In order to find the molar mass of an unknown compound, a research scientist prepared a solution of 0.930 g of an unknown in 125 g of a solvent. The pure solvent had a freezing point of 74.2^oC, and the solution had a freezing point of 73.4^o Given the solvents freezing point depression constant, K_f=5.50^oC/m, find the molar mass of the unknown.

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