2. The following data were obtained in an experiment to determine the freezing point of cyclohexane (C6H12). Time (s) 0 15 30 45 60 75 90 T (°C) 12.5 11.1 9.5 8.2 7.2 6.5 6.0 Time (s) 105 120 135 150 165 180 195 T (°C) 5.8 5.5 5.7 5.9 5.9 5.9 5.9 a. From the data above, over what range of time was the cyclohexane supercooled? b. What is the freezing point of cyclohexane?
2. The following data were obtained in an experiment to determine the freezing point of cyclohexane (C6H12). Time (s) 0 15 30 45 60 75 90 T (°C) 12.5 11.1 9.5 8.2 7.2 6.5 6.0 Time (s) 105 120 135 150 165 180 195 T (°C) 5.8 5.5 5.7 5.9 5.9 5.9 5.9 a. From the data above, over what range of time was the cyclohexane supercooled? b. What is the freezing point of cyclohexane?
Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter6: Solutions And Colloids
Section: Chapter Questions
Problem 6.56P
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Can you please do question number 2
Transcribed Image Text:th proper tempo)
Experiment 8 - Prelab Assignment
1. Benzene has a freezing point of 6.00 °C, a density of 0.8787 g/mL and a molal freezing point
depression constant (Kr) of 5.12 °C kg/mol. When 0.515 g of an unknown solute was dissolved in
12.3 mL of benzene, the solution that formed was found to have a freezing point of 4.10 °C. What is the
molecular mass of the unknown solute?
Time (s)
0
15
30
45
60
75
90
T (°C)
12.5
11.1
9.5
8.2
7.2
6.5
6.0
Time (s)
105
120
135
150
165
180
195
2. The following data were obtained in an experiment to determine the freezing point of cyclohexane
(C6H12).
T (°C)
5.8
5.5
5.7
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a. From the data above, over what range of time was the cyclohexane supercooled?
b. What is the freezing point of cyclohexane?
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