Chem 10 CP
Name: _____________________________
Unit 4 Study Guide
In order to be adequately prepared for your test, you will need to do the following:
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Study your notes
Read relevant sections of the textbook
Review all of the worksheets for this unit
Go over your homework assignments for this unit
1. Draw a Lewis dot structure for carboxylic acid with the following molecular formula; C3H6O2
2. Draw a structural formula for an ester with the following molecular formula: C2H4O2.
3. Draw a Lewis dot structural for an amine with the following molecular formula: C3H9N.
4. Draw a structural formula for an alcohol with the following molecular formula; C4H10O.
5. In the following equation, label the reactant(s), the product(s) and decide if it represents a
physical or a chemical change.
3 H2 + N2  2 NH3
6. What is the purpose of adding a catalyst to a chemical reaction?
7. Use structural formulas to write the reaction between propanoic acid (C3H6O2) and propanol
(C3H8O). Be sure to include the structures for the resulting products.
8. Rewrite the above reaction using molecular formulas.
9. Write the structural formulas (with labels) for the following functional groups:
Carboxyl, amine, ester, hydroxyl (alcohol)
10. With each functional group in the question above, give the related smell, and the appropriate
ending for its name.
11. Define the term “electron domain”.
12. What is the electron domain theory?
13. What is the first step (after determining the molecular formula) you need to do in order to
find the geometric shape of a small molecule?
14. How many electron domains surround each of the central atoms in the drawings shown
below?
15. What is the geometric shape of each of the structures given in the previous question?
16. How many unbonded (lone pair) electron domains are in HF? Do any of them determine
the shape of HF? Why or why not?
17. Determine the molecular geometry of the following molecules.
CH3OH
CH3NH2
PH3
C2H4
CH3Cl
H2S
HCN
H2CO
18. How many electron domains are contained in a double bond? In a triple bond?
19. Is the geometry of the electron domains in a molecule always the same as the molecular
geometry?
20. Consider the pentane molecule, C5H12.
a. Draw the Lewis dot structure for pentane.
b. How many electron domains does the molecule have?
c. What shape would you predict for the C5H10 molecule? (explain why the carbon chain is not
straight)
21. Relate the receptor site theory to the “lock and key” model? See pages 208 through 211 in the
text.
22. What did the results mean (attraction to a charged wand or beading on wax paper) in
regards to molecules in the “Attractions Between Molecules” activity?
23. What two things do we need to know about a small molecule in order to determine its
polarity?
24. What are intermolecular forces?
25. A. Name and define the three types of bonding.
B. Using dot structures, demonstrate what happens to the electrons involved in each type of
bonding.
26. Define electronegativity?
27. What is a dipole? (Explain the two definitions.)
28. What does the  symbol mean?
29. Determine the molecular geometry of the following molecules. Then label the molecules as
polar or nonpolar. Where possible, use the arrow symbol to indicate the direction of the dipole.
H2Se
CO2
PBr3
CF4
Cl2
SF2