Show your work, include units, and report the correct number of significant figures for all calculations. 1. The molal freezing point depression constant (K¢) for p-dichlorobenzene is 7.10°C/m and its normal freezing point (f.p.) is 53.10°C. When 0.304 g of an unknown solute is dissolved in 3.78 g of p-dichlorobenzene, the f.p. is lowered to 49.60°C. Refer to the Introduction and Data Sheet to solve the following problems. a) The f.p. depression (ATf) is °C. b) Calculate the molality (m) of the solution. c) Calculate the number of moles of solute in the solution. d) Calculate the molar mass of the unknown solute.
Show your work, include units, and report the correct number of significant figures for all calculations. 1. The molal freezing point depression constant (K¢) for p-dichlorobenzene is 7.10°C/m and its normal freezing point (f.p.) is 53.10°C. When 0.304 g of an unknown solute is dissolved in 3.78 g of p-dichlorobenzene, the f.p. is lowered to 49.60°C. Refer to the Introduction and Data Sheet to solve the following problems. a) The f.p. depression (ATf) is °C. b) Calculate the molality (m) of the solution. c) Calculate the number of moles of solute in the solution. d) Calculate the molar mass of the unknown solute.
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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Transcribed Image Text:Show your work, include units, and report the correct number of significant figures for all
calculations.
1. The molal freezing point depression constant (Kf) for p-dichlorobenzene is 7.10°C/m and
its normal freezing point (f.p.) is 53.10°C. When 0.304 g of an unknown solute is dissolved
in 3.78 g of p-dichlorobenzene, the f.p. is lowered to 49.60°C. Refer to the Introduction
and Data Sheet to solve the following problems.
a) The f.p. depression (ATf) is
°C.
b) Calculate the molality (m) of the solution.
c) Calculate the number of moles of solute in the solution.
d) Calculate the molar mass of the unknown solute.
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