9. When dissolved in 100 g of a solvent whose molecular weight is 94.10 and whose freezing point is 45.0°C, 0.550 g of a solute of molecular weight 110.1 gave a freezing point depression of 0.382°C. Again, when 0.4372 g of solute of unknown molecular weight was dissolved in 96.50 g of the same solvent, the freezing point lowering was found to be 0.467°C. From these data, find (a) the molecular weight of the unknown solute, (b) the cryoscopic constant of the solvent, and (c) the molar heat of fusion of the solvent. [ 74.2: 7.65; 10.34 kJ mol-'1

9. When dissolved in 100 g of a solvent whose molecular weight is 94.10 and whose freezing point is 45.0°C, 0.550 g of a solute of molecular weight 110.1 gave a freezing point depression of 0.382°C. Again, when 0.4372 g of solute of unknown molecular weight was dissolved in 96.50 g of the same solvent, the freezing point lowering was found to be 0.467°C. From these data, find (a) the molecular weight of the unknown solute, (b) the cryoscopic constant of the solvent, and (c) the molar heat of fusion of the solvent. [ 74.2: 7.65; 10.34 kJ mol-'1

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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9. When dissolved in 100 g of a solvent whose molecular weight is 94.10 and whose freezing
point is 45.0°C, 0.550 g of a solute of molecular weight 110.1 gave a freezing point depression
of 0.382°C. Again, when 0.4372 g of solute of unknown molecular weight was dissolved in
96.50 g of the same solvent, the freezing point lowering was found to be 0.467°C. From these
data, find (a) the molecular weight of the unknown solute, (b) the cryoscopic constant of the
solvent, and (c) the molar heat of fusion of the solvent. [ 74.2: 7.65; 10.34 kJ mol-'1

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