I have tow questions here !

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exam_2-extra_credit.doc

Chem 291A Name:________________________________

Fall, 2014

McCurdy

Exam 2 Extra Credit (5 points)

Use one side only. Use only space provided. No credit if written on your own paper. Due in class on December 8

4a. Circle the stronger acid, and briefly explain why it is a stronger acid, (using arguments based on relative charge stability). Draw one free energy vs. reaction coordinate diagram (similar to those in lecture and in Karty Chapter 6) for each pair of acids that is consistent with your answer.

image1.emf

O H

O HH

a.

b. Which of the protons indicated by an arrow is more acidic? Explain why in words and with pictures/other structures, if appropriate (using arguments based on relative charge stability). You do not need to draw a free energy versus reaction coordinate diagram.

image2.emf

C C C HH

H

H

H H

C C C HH

H

H

H HH

H

1