Textbook Chapters for Exam 4
Chapter 11, sections 15 and 7 (no sections 6 and 8). Chapter 15 (except section 7). You’re responsible for any material covered
in class whether it was on the homework or not. This review sheet covers most everything we have done.
Also remember that
no equations are given on the exams so you need to know them
. Values for equilibrium constants and any standard potentials
are given where needed.
Chapter 11  Electrochemistry
Remember your redox chemistry  Chapter 4. Know the basic
concepts that were presented on homework 12 (Redox Rxn
Review).
Know how to assign oxidation numbers to all the elements in a
given formula.
Know how to balance a redox equation in acid.
What is the difference in oxidation and reduction. KNOW your
definitions here!
Know what a redox reaction is. What is being oxidized and
what is being reduced? What is the oxidizing agent and what is
the reducing agent?
What is a halfreaction? Why is it so useful? Know how to
write halfreactions for both oxidations and reductions.
Know how to combine 2 halfreactions to give an overall cell
reaction. (electron balance?) This is essentially the same as
what was stated above except that in electrochemical cells we
run the 2 halfreactions in 2 different locations  that is we have
them physically separated.
Know the difference in voltaic vs electrolytic cells
Know how to write halfreactions for both oxidations and re
ductions.
Know how to combine 2 halfreactions to give an overall cell
reaction. (electron balance?)
Know how to draw a picture of both a voltaic and an electro
lytic cell if given the shorthand notation.
anode  anodic solution
 cathodic solution  cathode
where the "" are phase changes and "" is a salt bridge.
What's the sign convention used for the cathode and anode?
What's the significance of the SHE?
What's an inert electrode? Used for what? Pt in the SHE, graph
ite in a dry cell
Know what standard conditions are and how it is symbolized
(same as always).
Calculations, how to get:
•
E
0
for any halfreaction (look it up in a table if it is not given
in the question itself).
•
E
0
for any overall cell reaction.
E
cell
0
=
E
red
0
+
E
ox
0
remember that Zumdahl uses cathode potential minus the
anode potential which is the same as above. My oxidizing po
tential is the “minus the anode potential”. Bottom line is that
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 Spring '07
 Holcombe
 Electrochemistry, Reaction, Potential energy diagram, Dr. McCord CH302

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