Exam_2_Review_Sheet_F2007

# Exam_2_Review_Sheet_F2007 - Review Sheet Exam II The topics...

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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 Solvent-solvent (liquid-liquid) extraction - Be able to illustrate a solvent-solvent extraction process - What is an extraction and why do we perform extractions? - How and why does solvent-solvent extraction work? - What is the partition coefficient (K) and how does it apply to a solvent-solvent 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 solvent-solvent extraction. - Know how to calculate a distribution coefficient. - Know how to use the distribution coefficient if pH effects are in play during a solvent-solvent 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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Exam_2_Review_Sheet_F2007 - Review Sheet Exam II The topics...

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