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Unformatted text preview: overlap over each other. What could be the problem? a. The sample spotted is too polar to travel on the plate b. The sample spotted is too concentrated c. The sample spotted is too dilute d. The mobile phase is too polar e. None of the above 47. Let’s say you want to separate two compounds that contain carboxylic acid functionalities using a silica gel TLC. The compounds do not move up the plate at all, even with polar solvents. What can you do to separate them? a. Try with reverse phase silica gel plates b. Use cellulose TLC plates c. Use alumina TLC plates d. A and B e. A, B and C 48. Place the following solvents in order of lowest to highest polarity a. Ethyl acetate, hexanes, acetone, water b. Water, ethyl acetate, acetone, hexanes c. Hexanes, ethyl acetate, water, acetone d. Hexanes, ethyl acetate, acetone, water e. None of the above Experiment 6 and Gas Chromatography 49. The acid catalyzed dehydration of 2‐butanol to butene gave a mixture of products. Another possible product resulted from a methyl s...
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This note was uploaded on 05/17/2011 for the course CHEM 6al taught by Professor Pettus during the Spring '08 term at UCSB.
- Spring '08