Name____________________________
Worksheet 4.3 Functional groups and Condensation Reactions
1. Define the term functional group.
2. In each box below, draw the named functional group; give its related smell, and the appropriate
ending for its name.
Ester
Amine
Carboxylic acid
Hydroxyl
3. Draw a Lewis dot structure for carboxylic acid with the following molecular formula: C6H12O2.
4. Draw a structural formula for an ester with the following molecular formula: C6H12O2.
5. Draw a Lewis dot structure for an amine with the following molecular formula: C7H17N.
6. Draw a structural formula for an alcohol with the following molecular formula; C8H18O.
7. In the following equation, label the reactant(s), the product(s) and decide if it represents a physical or
a chemical change.
2 H2 + O2  2 H2O
8. Explain the following reaction with labels for reactants, products, and the catalyst. Also circle and
name the functional groups found on the molecules.
9. a. What is the purpose of adding a catalyst to a chemical reaction?
b. What is the catalyst in the reaction in question 8?
10. What does the arrow indicate in question 8? What is the proper name for this symbol?
11. a. Use structural formulas to write the reaction between butyric acid (C4H8O2) and ethanol (C2H6O).
Be sure to include the structures for the resulting products.
b. Rewrite the above reaction using molecular formulas.
c. How does the “law of conservation of matter” apply to chemical reactions?
12. a. What is a condensation reaction?
b. This reaction can also be classified as a ____________________________________.
Explain why this is an appropriate way to classify it.