212Exam3F05 - Exam 3 Name(Please Print Clearly In order to receive partial credit you must write any relevant chemical and equilibrium equations

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Exam 3 Chem 212 Fall 2005 Name________________________________ (Please Print Clearly) In order to receive partial credit you must write any relevant chemical and equilibrium equations for the following problems. 1) A chromatography column with a length of 10.3 cm and an inner diameter of 4.61 mm is packed with a stationary phase that occupies 61.0% of the volume of the tube. a) If the volume flow rate is 1.13 mL/min, what is the linear flow rate in cm/min? b) How long does it take unretained solvent to pass through the column? c) Find the retention time for a solute that has a capacity factor of 10.0.
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2) Draw a van Deemter plot showing all three factors that contribute to the overall shape of the combined curve (include the combined curve as part of the plot). Make sure to label all of the curves (there should be four curves) and the axes of the plot. Briefly discuss why each curve has the specific shape it has and how that shape relates to the plot axes.
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3) a. Discuss the advantages and disadvantages of packed and open tubular chromatography columns.
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This note was uploaded on 02/16/2010 for the course CHEM 589 taught by Professor -1 during the Fall '02 term at Pennsylvania State University, University Park.

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212Exam3F05 - Exam 3 Name(Please Print Clearly In order to receive partial credit you must write any relevant chemical and equilibrium equations

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