MH 14CL Final Exam Practice Problems Answers W16

MH 14CL Final Exam Practice Problems Answers W16 -...

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Chemistry 14CL Winter 2016 Answers to Practice Problems for Final Exam Final Exam on Monday March 14 3:00 pm – 6:00 pm in CS 50 NO Re-grade for Final & NO MAKE- UP EXAM. You are allowed to use ONE “cheat” sheet (8.5” X 11”) for the exam (Note: you may write anything on BOTH sides of the “cheat” sheet). NO OTHER MATERIALS WILL BE ALLOWED (including lab manual and lab notebook) NO Re-grade for Final Bring a Calculator & your student ID to the exam. The final exam will be cumulative (i.e. include ALL the experiments and topics that covered in Lectures). Make sure that you review all the concepts discussed in lectures and also in the pre-lab and post-lab reports for the exam. 1. (a) (I) When there is only one group substituted on the 6-membered aromatic ring you have symmetry on the aromatic ring and only 4 lines will be seen. The three CH 3 ’s of the trimethyl group are also identical. You wil get 7 lines. The ketone will occur around 200ppm, there will be 4 lines in the 130 - 180 ppm region due to the phenyl ring, and two lines in the aliphatic region around 35 and 25. In the DEPT 90 spectrum you will see three of the lines in the 130 - 180 due to the three types of CH group. In the DEPT 135 spectrum, you will see the line atttributed to the CH 3
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