14D_w10_finalA_key

14D_w10_finalA_key - Chemistry 14D Winter 2010 Final Exam...

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Chemistry 14D Winter 2010 Final Exam Part A Solutions Page 1 Statistics : High score, average and low score will be posted on the course web site after exam grading is complete. The exam is ready to be picked up (or mailed out if you gave an envelope) when these numbers are posted. A note about exam keys : The answers presented here are usually significantly longer than expected from a student taking the exam. An exam key serves not only to reveal what was expected, but to instruct you as well. To see the final course grade cutoffs, consult the grading scale on the Chem 14D course web page. 1. N CH 3 CH 3 O NaOH H 2 O CH 3 N H + O CH 3 O 2. Hydrolysis of molecule A with aqueous NaOH is faster than hydrolysis with water by itself because hydroxide ion is a better nucleophile than water. 3. N O Ph Ph CH 3 CH 3 OH N Ph Ph CH 3 CH 3 OH O N Ph CH 3 O O H Ph CH 3 N Ph CH 3 O O Ph CH 3 H + 4. N CH 3 CH 3 O H 2 O H 2 SO 4 CH 3 N + HO CH 3 O H H 5. Hydrolysis of molecule A with aqueous H 2 SO 4 is faster than hydrolysis with water by itself because protonation
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14D_w10_finalA_key - Chemistry 14D Winter 2010 Final Exam...

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