Lab Report - Experiement#8 - A A B B C C Questions 1. The...

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A B C A B C Questions 1. The first TLC plate they developed might have had some potential erros with Rf values due to the location of solvent front and its accuracy in determining the result, or how well the middle of the spot was defined, and how much compound was spotted. By cospotting them on same TLC place, they can create same environmental conditions for the experiment, so that the result can be more accurate. 2. No. It is possible that ether may extract things hexane can’t. These solvents evaporate off the place already, because they extract different compounds from the same spice. 3. Lower Rf value resulted in 100% hexane since polar compound more attracted to polar stationary phase. 90% hexane: 10%ethyl acetate 100% hexane 4. TLC absorbent is not chiral, so TLC cannot discern enantiomers. You would need to use a chiral silica derivative when analyzing this sample. 5. These two isomeric mixtures are not separated by TLC because they do not differ greatly in their polarity.
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This note was uploaded on 11/23/2009 for the course CHEM 3BL taught by Professor Chunmei during the Summer '08 term at University of California, Berkeley.

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Lab Report - Experiement#8 - A A B B C C Questions 1. The...

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