383Q2'08 - CHE 383 Theory-Practice Quiz#2 Dec 4 2008 Name...

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CHE 383 Theory-Practice Quiz #2 Dec. 4, 2008 Name_____________________________________ Lab day (circle): Monday Tuesday This quiz is based on material from the TLC, column chromatography, distillation, gas chromatography, ester, IR, ferrocene, and lidocaine experiments. It has 8 pages (including this cover page). 1. _________/6 2.a. _________/6 2.b. _________/3 3. _________/4 4.a. _________/3 4.b. _________/5 5. _________/5 6. _________/3 7. __________/4 8. _________/4 9. _________/4 10. _________/3 11. _________/4 12. _________/6 13.a. _________/5 13b. _________/5 13c. _________/5 Total________/75
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1. The figures below depict the GC results from an early fraction and a late fraction from simple distillation of a mixture of two liquids. Indicate which GC trace is from the early fraction and which is from the late fraction, and briefly explain the basis for your answer. A B time time 2. Assume that sample a in the developed TLC plate below is a mixture of phenol (most polar), nitrobenzene (less polar) and ethylbenzene (least polar). a. Indicate what compounds are present in samples b and c from a separation experiment of a mixture of the three compounds from sample a . a
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383Q2'08 - CHE 383 Theory-Practice Quiz#2 Dec 4 2008 Name...

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