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ochem 3rd test 2006 key

ochem 3rd test 2006 key - CHEMISTRY 314-01 MIDTERM 3 answer...

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CHEMISTRY 314-01 MIDTERM # 3 – answer key April 11, 2006 Statistics: Average: 71 pts (71%); Highest: 98 pts (98%); Lowest: 28 pts (28%) Number of students performing at or above average: 27 (57%) Number of students at 55% or below: 13 (28%) Number of students at 90% or above: 10 (21%) 1. (5 pts) Mark as true ( T ) or false ( F ) the following statements. Do not explain! ( T ) Carboxylic acids can serve as Brønsted bases; ( T ) Base-promoted hydrolysis of esters is irreversible; ( F ) Esters can be formed from carboxylic acids and alcohols in both acid-catalyzed and base-promoted reactions; ( T ) Amides are the least reactive of all acid derivatives; ( T ) β -ketoesters are more acidic than water; 2. Circle ALL that apply: A. (3 pts) The following classes of compounds ALWAYS contain cyclic structures: a. Lactones; b. Dicarboxylic acids; c. Lactams ; d. α,β -unsaturated carbonyl compounds; B. (3 pts) Carboxylic acid anhydrides are less reactive than: a. Carboxylic acid chlorides; b. Carboxylic acid bromides; c. Esters; d. Amides; C. (3 pts) The following compounds CANNOT undergo Claisen self-condensation: a. Ethyl benzoate; b. Methyl 2,2-dimethylpropanoate; c. Ethyl 2-methylbutanoate; d. Ethyl 3-methylbutanoate; D. (3 pts) The following are dicarboxylic acids: a. Ethanedioic acid; b. Oxalic acid; c. Benzoic acid; d. Terephthalic acid; 3. (5 pts) Provide the correct structure, matching each of the following names:
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ochem 3rd test 2006 key - CHEMISTRY 314-01 MIDTERM 3 answer...

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