Technique Report -Distillation and Boiling Point- Experiment 1 Experimental determination of ethanol boiling point gives the following results: Trial В.Р (°C) 75.6 77.1 1 2 76.3 The value for the atmospheric pressure in the laboratory was measured to be 711 mmHg. 1. Determine the corrected boiling point of ethanol. Show your work. 2. Calculate the % error compared to the reported standard value for ethanol boiling point which is 79.0 °c. 3. Discuss two potential reasons that might result in errors in b.p. measurements (please do not include reasons such as: thermometer not working properly or any other instrumental errors).

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter12: Gaseous Chemical Equilibrium
Section: Chapter Questions
Problem 60QAP
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4:24 PM Thu Feb 11
* O 74%
くロ
T
+ :
11, 2021 at 4:07 PM
Technique Report
-Distillation and Boiling Point-
Experiment 1
Experimental determination of ethanol boiling point gives the following results:
Trial
B.P (°C)
1
2
75.6
77.1
76.3
The value for the atmospheric pressure in the laboratory was measured to be 711 mmHg.
1. Determine the corrected boiling point of ethanol. Show your work.
2. Calculate the % error compared to the reported standard value for ethanol boiling point
which is 79.0 °C.
1
3. Discuss two potential reasons that might result in errors in b.p. measurements (please do
not include reasons such as: thermometer not working properly or any other instrumental
errors).
Transcribed Image Text:4:24 PM Thu Feb 11 * O 74% くロ T + : 11, 2021 at 4:07 PM Technique Report -Distillation and Boiling Point- Experiment 1 Experimental determination of ethanol boiling point gives the following results: Trial B.P (°C) 1 2 75.6 77.1 76.3 The value for the atmospheric pressure in the laboratory was measured to be 711 mmHg. 1. Determine the corrected boiling point of ethanol. Show your work. 2. Calculate the % error compared to the reported standard value for ethanol boiling point which is 79.0 °C. 1 3. Discuss two potential reasons that might result in errors in b.p. measurements (please do not include reasons such as: thermometer not working properly or any other instrumental errors).
Expert Solution
Step 1 : Determining the corrected Boiling Point of ethanol

Value for Atmospheric Pressure in Laboratory = Pobserved = 711 mm Hg

Standard Atmospheric pressure at sea level = 0.045 ° C per mm Hg

Trial Boiling Point(°C)
1 75.6
2 77.1
3 76.3

For trial 1 

The Formula For Corrected Boiling Point is

BPcorrected = BPobserved-(Pobserved-760mm Hg) *0.045°C mmHg-1                     = 75.6°C-(711-760 mm Hg) * 0.045 °C mmHg-1                      =77.805°CTrial 2BPcorrected = BPobserved-(Pobserved-760mm Hg) *0.045°C mmHg-1                     = 77.1°C-(711-760 mm Hg) * 0.045 °C mmHg-1                      =79.305°CTrial 3BPcorrected = BPobserved-(Pobserved-760mm Hg) *0.045°C mmHg-1                     = 76.3°C-(711-760 mm Hg) * 0.045 °C mmHg-1                      =78.505°C

 

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