Chemistry 12A
Lab Quiz 3
Fall 1999
1. Draw the reactants and products for the dehydration of:
(a) 1-Methylcyclohexanol (3 pts)
(b) 2,2-Dimethylcyclohexanol (3 pts)
(c) 4-Methyl-2-Pentanol (3 pts)
2. Draw Structures for the following compounds:
(a) cis-4-methyl-2-pentene (3 pts)
(b) trans-4-methyl-2-pentene (3 pts)
3. If 8 g of aniline (MW ) is allowed to react with excess acetic anhydride, what is the
theoretical yield of acetanilide (MW ) in: (Show your work!)
(a) moles? (4 pts)
Chemistry 12A
Lab Quiz 3
Fall 1999
(b) grams? (3 pts)
4. During the crystallization of acetanilide, why is the mixture coled in an ice bath? (3
pts)
5. Aniline (an amine) is basic and acetanilide(an amide) is not basic. Explain. (3 pts)
6. In the kinetc study: ln K = -Eact / RT + ln A, the slope of your line was equal to
-Eact / R, why? (3 pts)
7. In the nitration of methyl benzoate, why was it important to add the nitric acidsulfuric acid mixture slowly? (3 pts)
8. Identify, using the following IR spectrum the compound with molecular formula,
C8H7O4N. (ItÕs from one of your labs......) (4 pts)
Chemistry 12A
Lab Quiz 3
Fall 1999
9. Draw the products formed from the reaction of cyclohexene with dichlorocarbene in
the
presence of sodium hydroxide. (3 pts)
10. When weighing out the phase transfer catalyst for the addition of dichlorocarbene
the jar
must be quickly closed because it is hydroscopic. What does
hydroscopic mean?
(3 pts)
11. In the crystallization of the endo, cis-diacid why is it important to allow the solution to
cool slowly and undisturbed? (3 pts)
12.
Chemistry 12A
Lab Quiz 3
Fall 1999