Quiz3_000 - efficient separation and the one that gives the...

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Quiz 3 S343 Summer 2009 Name___________________________________________________________ 1. (2 pts) A student carried out the following reaction and analyzed it by TLC. Assuming all the expected spots are visible and there are no impurities, how many spots should the student see? 2. (2 points) If the reaction from question 1 is analyzed by Gas Chromatography (GC) under a certain set of conditions, 1-bromobutane has a retention time of 1.28 minutes. Name two ways that GC conditions could be changed to decrease the retention time. 3. (3pts) Are the following advantages of GC or TLC? _________ Less expensive _________ Better resolution _________ Ability to determine product distribution 4. (2pts) For the following three techniques, choose the one that gives the MOST
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Unformatted text preview: efficient separation and the one that gives the LEAST efficient separation. Gas Chromatography Simple Distillation Fractional Distillation 5. (2pts) What procedural error can lead to distillation of a pure compound, but the thermometer reads a temperature that is far too low? 6. (3 pts) Refer to the drawing: 7. (3pts) Are the following techniques more effective for purification of a reaction mixture or analysis of a reaction mixture? _______________________Gas chromatography _______________________TLC _______________________Distillation 8. (3pts) The following reaction is an example of what type of mechanism? If steric factors are more important than product stability in determining the product distribution, circle the product that would form preferentially....
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Quiz3_000 - efficient separation and the one that gives the...

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