mass of t-butanol = 7.438 g mass of unknown = 0.342 g freezing temp solution = 22.85 C freezing temp t-butanol = 24.3C kf calculated = 11.96 2. Calculate the molar mass of your unknown. a. You will use the freezing point depression constant calculated in question 2 and the change in freezing point temperature to calculate the molality (m) of your solution (AT = K,m). %3D b. You can then use this molality to calculate the moles of unknown solute. m = moles of solute/kg of solvent grams/mole. C. Now you may determine the molar mass of your unknown. MM =

mass of t-butanol = 7.438 g mass of unknown = 0.342 g freezing temp solution = 22.85 C freezing temp t-butanol = 24.3C kf calculated = 11.96 2. Calculate the molar mass of your unknown. a. You will use the freezing point depression constant calculated in question 2 and the change in freezing point temperature to calculate the molality (m) of your solution (AT = K,m). %3D b. You can then use this molality to calculate the moles of unknown solute. m = moles of solute/kg of solvent grams/mole. C. Now you may determine the molar mass of your unknown. MM =

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter10: Properties Of Solutions

Section: Chapter Questions

Problem 7RQ

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Similar questions

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