Midterm2W09 Key

Whatcanbe interpretedfromit 1 2 3 2 3

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Unformatted text preview: ch component of TLC is constant? a. The mobile phase b. The Rf value of a compound c. The stationary phase d. A and C e. All of the above I meant for the question to say “which component of a silica gel TLC is constant”. So there is no right answer since I did not specify. This question will be removed. 16. With respect to TLC, compounds that are non‐polar a. Travel less than polar compounds b. Travel further than polar compounds c. Are never visible under UV light d. B and C e. None of the above a. b. c. d. e. 17. Consider the TLC below. Lane 1 is starting material, lane 2 is a co‐spot containing both the starting material and the crude product, and lane 3 is the crude product. What can be interpreted from it? 1 2 3 2 3 The crude product is less polar than the starting material The reaction is approximately 50% complete The separation of the compounds is not ideal The starting material is more non‐polar than the crude product None of the above 18. Consider the following TLC. The mobile phas...
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This note was uploaded on 04/23/2012 for the course CHEM 6al taught by Professor Pettus during the Spring '08 term at UCSB.

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