1. A student determines the molar mass of acetone, CH3COH3, by the method used in this experiment. She found that the equilibrium temperature of a mixture of ice and water was 0.5°C on her thermometer. When she added 10.5 g if her sample to the mixture, the temperature, fell to -2.6°C. She then poured off the solution through a screen into a beaker. The mass of the solution was 86.4g. a. What was the freezing point depression? °C b. What was the molality of the acetone? m c. How much acetone was in the decanted solution? d. How much water was in the decanted solution? e. How much acetone would there be in a solution containing 1 kg of water and acetone at the same concentration as she had in her experiment? g acetone f. What did she find to be the molar mass of acetone, assuming she made the calculation properly?

1. A student determines the molar mass of acetone, CH3COH3, by the method used in this experiment. She found that the equilibrium temperature of a mixture of ice and water was 0.5°C on her thermometer. When she added 10.5 g if her sample to the mixture, the temperature, fell to -2.6°C. She then poured off the solution through a screen into a beaker. The mass of the solution was 86.4g. a. What was the freezing point depression? °C b. What was the molality of the acetone? m c. How much acetone was in the decanted solution? d. How much water was in the decanted solution? e. How much acetone would there be in a solution containing 1 kg of water and acetone at the same concentration as she had in her experiment? g acetone f. What did she find to be the molar mass of acetone, assuming she made the calculation properly?

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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Question

1. A student determines the molar mass of acetone, CH3COH3, by the method used in this
experiment. She found that the equilibrium temperature of a mixture of ice and water was
0.5°C on her thermometer. When she added 10.5 g if her sample to the mixture, the
temperature, fell to -2.6°C. She then poured off the solution through a screen into a beaker.
The mass of the solution was 86.4g.
a. What was the freezing point depression?
°C
b. What was the molality of the acetone?
m
c. How much acetone was in the decanted solution?

d. How much water was in the decanted solution?
e. How much acetone would there be in a solution containing 1 kg of water and
acetone at the same concentration as she had in her experiment?
g acetone
f. What did she find to be the molar mass of acetone, assuming she made the
calculation properly?

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1. A student determines the molar mass of acetone, CH,COH., by the method used in this experiment. She found that the equilibrium temperature of a mixture of ice and water was 0.5°C on her thermometer. When she added 10.5 g if her sample to the mixture, the temperature, fell to -2.6°C. She then poured off the solution through a screen into a beaker. The mass of the solution was 86.4g. d. How much water was in the decanted solution?
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