Chapter 21 Homework

Homework 21.1

1. Give the general formula and class of organic compounds for each of the following:

a) CH3--OH

b) CH3--O--CH3

c) Br--CH2--CH2--CH3

2. Giv the name of each of the following:




3. Compare the boiling points of alcohols, ethers, and alkanes, and explain one reason for the differences.

4. Draw condensed structural formulas for each of the following:
a) 1,2-propanediol
b) ethyl methyl ether
c) dichloromethane

5. Draw the condensed structural formulas for each of the following:
a) 2,3-pentanediol
b) 1-pentanol
c) 1,2,3-propanetriol
d) ethanol
e) 2,3,4-trichloropentane
f) 1,1-diiodopropane
g) 1-fluorohexane
h) 2,2-dichloro-1,1-difluoropropane

6. Name the following:


7. Name the following:
a) CH3--CH2--CH2--O--CH2--CH2--CH3
b) CH3--O--CH2--CH3
c) CH3--CH2--CH2--CH2--O--CH2--CH2--CH2--CH3
d) CH3--CH2--O--CH2--CH2--CH2--CH3

8. Draw condensed structural formulas for each of the following:
a) dimethyl ether
b) methyl propyl ether
c) butyl propyl ether
d) ethyl heptyl ether

Homework 21.2

1. Draw condensed structural formulas for each of the following:
a) ethyl ethanoate
b) triethylamine
c) butanal

2. a) How are aldehydes and ketones alike?
b) How do they differ from each other?

3. How do the strengths of organic acids compare with the strengths of most inorganic acids?

4. Show the reaction that occurs when amines are dissolved in water.

5. Why can’t a carboxyl group be in the middle of a carbon-atom chain?

6. How are esters related to carboxylic acids?

7. Draw condensed structural formulas for each of the following:
a) methanal
b) hexanal
c) octanal
d) ethanal
e) 3-hexanone
f) 2-pentanone
g)2-octanone
h) 2-hexanone
i) butanoic acid
j) hexanoic acid
k) hexanedioic acid
l) heptanoic acid
m) ethylamine
n)diethylmethylamine
o) butyl ethanoate
p) propyl propanoate

8. Do problem 43 on page 696 of your text.

9. Do problem 45 on page 696 of your text.

10. Do problem 47 on page 696 of your text.

11. Do problem 49 on page 696 of your text.

12. Do problem 51 on page 696 of your text.

Homework 21.3

1. Can an addition reaction occur between chlorine and ethane? Why or why not?

2. Does an addition reaction increase or decrease the saturation or a molecule?

3. What functional groups does the molecule of water come from in the condensation reaction between two amino acids?

4. Explain how elimination reactions could be considered the opposite of addition reactions.

5. Do problem 53 on page 696 of your text.

6. Do problem 54 on page 697 of your text.

7. Do problem 55 on page 697 of your text.

8. Do problem 56 on page 697 of your text.

Homework 21.4

1. Would the handles of cookware more likley be made of a thermosetting polymer or a thermoplastic polymer? Why?

2. Would it be possible to have an addition polymer sythesized from a monomer that has only single bonds? Why or why not?

3. Why can a molecule with only one functional group not undergo a condensation reaction to form a polymer?

4. Classify each of the following as thermosetting or thermoplastic:
a) linear polymer
b) branched polymer
c) cross-linked polymer

5. What are two reaction by which polymers can be formed?