Organic Chemistry 354 Quiz - September 9, 1997

Dr. Sundin

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1. Define the following: Answer

a. Bronsted-Lowry base
b. Lewis base

2. Give the formula of each of the following: Answer

a. Conjugate acid of NH3

b. Conjugate base of NH3

3. HF = 3.2; HNO2 = 3.37; HCN = 9.2; HIO = 10.6

Given the pKa data above, encircle the stronger acid and underline the weaker base in each of the following:

a. HF + CN-1 F-1 + HCN

b. HIO + F-1 IO-1 + HF Answer

4. Rewrite the left to right reaction of #3.a. and show the acid base reaction using the curved arrow notation. Answer

5. a. Draw the Lewis structure of SO2. Answer

b. Redraw the structure using a single line for each bond and omit the nonbonding electrons. Indicate the direction of polarity of the polar bonds (if any) using a arrow.
c. Indicate the direction of the dipole moment (if any) of the molecule using an arrow.

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