Macroscale and Microscale Organic Experiments
7th Edition
ISBN: 9781305577190
Author: Kenneth L. Williamson, Katherine M. Masters
Publisher: Brooks Cole
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Chapter 5, Problem 13Q
Interpretation Introduction
Interpretation:
The explanation for the arrangement of water inlet and outlet position in the water-cooled condensers should be given.
Concept introduction:
The process to separate the component from a liquid mixture by boiling of selective liquid followed by condensation of the mixture is called distillation. The distillation depends upon the boiling point difference of the components. The distillation is used in various industries to get the pure component
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Why is it preferable to allow cold water to enter at the bottom of a condenser and exit at the top rather than vice versa?
A solution of acetic acid
CH3COOH
and water is boiling at
100.4°C
. A sample of the vapor above the solution is cooled until it condenses. This condensed sample is analyzed, and turns out to be
10.%
acetic acid by mass.
Calculate the percent by mass of acetic acid in the boiling solution. Here's some data you may need:
normal boiling point
density
vapor pressure at
100.4°C
acetic acid
118.°C
1.1gmL
538.torr
water
100.°C
1.00gmL
771.torr
Be sure your answer has 2 significant digits.
Note for advanced students: you may assume the solution and vapor above it are ideal.
Why would industry prefer to purify solids by sublimation or zone refining rather than recrystallization? (Hint: is there anything wasteful about recrystallization)
Chapter 5 Solutions
Macroscale and Microscale Organic Experiments
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