Review Sheet:
Exam II
The topics, terms, concepts, and questions presented on this review sheet
highlight the important concepts that I expect you to know or be familiar with.
Any type
of problem covered in class or in your homework is fair game.
I will post a separate
sheet listing the equations that I will provide you for the exam under
Handouts
on
Blackboard.
Chapter 23:
Introduction to Analytical Separations
●
Solventsolvent (liquidliquid) extraction
 Be able to illustrate a solventsolvent extraction process
 What is an extraction and why do we perform extractions?
 How and why does solventsolvent extraction work?
 What is the partition coefficient (K) and how does it apply to a solventsolvent
extraction?
 Know how to use the partition coefficient and know how to write the
equilibrium expression that corresponds to the partition coefficient.

Know how to calculate the fraction of solute left behind (q) after some number
of extractions (n).
 Know how to calculate the fraction
of solute extracted after some number of
of extractions.
 Is it better to do many extractions with small volumes or one large extraction?
 Know and understand how pH effects a solventsolvent extraction.
 Know how to calculate a distribution coefficient.
 Know how to use the distribution coefficient if pH effects are in play during a
solventsolvent extraction.
 Know how to calculate the fraction of solute remaining or extracted at a given
pH using the distribution coefficient.
●
Chromatography
 What is chromatography?
How is it similar to and different from solvent
solvent extraction.
 What are the major types of chromatography and where do they apply?
 Know how to draw and read a chromatogram.
 Know what retention time, retention volume, adjusted retention time are and
how they apply to what we observe in a chromatogram.
 What does relative retention mean and what does it tell us about a separation.
I
am not talking about spitting out a formula here.

What does capacity factor tell us about a separation, again without simply
spitting out a formula.
If a solute has a small capacity factor, what does that
mean.
If a solute has a large capacity factor, what does that mean.

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 Fall '08
 tiani
 Chromatography, van deemter equation, Chromatographic Methods and Capillary Electrophoresis

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