PRINCIPLES OF INSTRUMENTAL ANALYSIS
7th Edition
ISBN: 9789353506193
Author: Skoog
Publisher: CENGAGE L
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Chapter 30, Problem 30.4QAP
Interpretation Introduction
Interpretation:
The principle of separation by CZE is to be stated.
Concept introduction:
The capillary zone electrophoresis is a type of electrophoresis in which separation of buffer solution takes place because of electrosoomotic flow. The buffer solution remains constant throughout the separation process. The rate of electrosoomotic flow controls the rate of migrating particles. The ionic compounds are easily separated by this method. The separation solution depends on the physical characteristics of the compound such as hydrodynamic radius, charge and ionic force of ions.
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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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rise by adding NO2?
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of NO 2 needed to reverse it.
Round your answer to 2 significant digits.
00
rise
☐ x10
fall
yes
no
☐ atm
G
Ar
1
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