Exam%203%20Fall%20%2709

Exam%203%20Fall%20%2709 - NAME (Print): _ SIGNATURE: _...

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Chemistry 310M/318M Dr. Brent Iverson 3rd Midterm November 19, 2009 NAME (Print): _____________________________ SIGNATURE: _____________________________ Please Note: This test may be a bit long, but there is a reason. I would like to give you a lot of little questions, so you can find ones you can answer and show me what you know, rather than just a few questions that may be testing the one thing you forgot. I recommend you look the exam over and answer the questions you are sure of first , then go back and try to figure out the rest. Also make sure to look at the point totals on the questions as a guide to help budget your time. You must have your answers written in PERMANENT ink if you want a regrade!!!! This means no test written in pencil or ERASABLE INK will be regraded. Please note: We routinely xerox a number of exams following initial grading to guard against receiving altered answers during the regrading process. Please print the first three letters of your last name in the three boxes
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10 9 8 7 6 5 4 3 2 (21) (16) (14) (18) (20) (43) (27) (16) (14) (18) (20) (14) (8) (15) (15) (279) 11 1 Total T Score HW 12 13 14 % Total Grade (HW score + Exam Grade) Page Points 15
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Honor Code The core values of the University of Texas at Austin are learning, discovery, freedom, leadership, individual opportunity, and responsibility. Each member of the University is expected to uphold these values through integrity, honesty, trust, fairness, and respect toward peers and community. (Your signature)
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CH 3 CH 2 - H R 2 C C H H H -N( i- C 3 H 7 ) 2 RC C H COR' O RC H 2 CR' O RC H 2 CH O RC H 2 CCl O RC H 2 RCH 2 O H HO H ROC O COR' O C H 2 RC O COR' O C H 2 RC O CR' O C H 2 H 4 N CO- H O CH 3 RCH 2 O H 2 H 3 O H -Cl 10 51 -7 Compound pK a 4.8 15.7 16 18-20 11 23-25 18-20 13 15-19 40 Acetic acid ! -Dicarbonyls ! -Ketoesters ! -Diesters Water Alcohols Acid chlorides Aldehydes Ketones Esters LDA Alkanes Terminal alkynes 25 Terminal alkenes 44 9.2 Ammonium ion Hydronium ion Hydrochloric acid Protonated alcohol -2 -1.7 H 3 N 10.8 Ethyl ammonium ion CH 2 CH 3
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Pg 1 _____________(21) 1. (5 pts) What is the most important question in organic chemistry? Signature_________________________ Where are the electrons? 2. (10 pts) Amides are best represented as the hybrid of three contributing structures. Draw the second and third important contributing structures in the spaces provided, including all lone pairs and formal charges. For the two structures on the left in each problem, use arrows to indicate the movement of electrons to give the structures you drew. There is no need to draw any circles around any of these contributing strucures. You might want to read these directions again to make sure you know what we want C H H H C O N H H C H H H C O N H H C H H H C O N H H 3. (6 pts) At pH 7.0 in water, circle the species that will be predominant for the amino acid alanine. Put an "X" through the species that will be present at pH 2.0.
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Exam%203%20Fall%20%2709 - NAME (Print): _ SIGNATURE: _...

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