
Principles of Instrumental Analysis
7th Edition
ISBN: 9781337468039
Author: Skoog
Publisher: Cengage
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Chapter 24, Problem 24.8QAP
Interpretation Introduction
Interpretation:
The percent CCl4 and CHCl3 in each mixture should be calculated.
Concept introduction:
Coulometry is a quantitative analytical technique which involve measuring the quantity of electricity required to convert the analyte to a different oxidation state.
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Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
2NO2 (g) = N2O4(g)
AGº = -5.4 kJ
Now suppose a reaction vessel is filled with 4.53 atm of dinitrogen tetroxide (N2O4) at 279. °C. Answer the following questions about this system:
Under these conditions, will the pressure of N2O4 tend to rise or fall?
Is it possible to reverse this tendency by adding NO2?
In other words, if you said the pressure of N2O4 will tend to rise, can that
be changed to a tendency to fall by adding NO2? Similarly, if you said the
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'2'
rise by adding NO2?
If you said the tendency can be reversed in the second question, calculate
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Round your answer to 2 significant digits.
00
rise
☐ x10
fall
yes
no
☐ atm
G
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1
Chapter 24 Solutions
Principles of Instrumental Analysis
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