Quiz 6 material

[Robert Zellmer]

Quiz 6: *Chapter 20 *

*Sections 20.1-20.5:*

Understand oxidation states (oxidation numbers), redox reactions,
what is oxidized and reduced and what are oxidizing and reducing
agents (oxidant and reductant).

Be able to balance redox reactions using the half-rxn method.

Understand voltaic cells.  Remember, oxidation occurs at the
anode and reduction at the cathode.  Understand the shorthand
notation as given in lecture and the notes (and homework
exercise 20.99 in 12th ed., 20.95 in the 11th ed. and 20.93
in the 10th ed.).

Understand cell potentials and standard cell potentials and
how the two are related.  Understand how to calculate them
from reduction potentials.  Understand how standard reduction
potentials relate to the strengths of oxidizing and reducing
agents.  You need to know what is meant by standard conditions
(1 M for conc of things in soln and 1 atm partial pressures
for gases).

Understand how E and delta(G) are related and how E^o and
delta(G^o) and the equilibrium constant are related and that
a negative delta(G^o) and positive E^o indicate a spontaneous
rxn and a K > 1.

*Section 20.6:*

Nernst Eqn. You should be able to use this eqn.
to calculate the E for a cell under nonstandard conditions.

*Sections 20.7 & 20.8:*

Batteries and fuel cells and corrosion.
Understand batteries in general, you don't need to memorize
specific batteries.

*Section 20.9:*

Electrolysis, quantitative aspects of electrolysis
(stoichiometry).  What are the differences and similarities between
voltaic and electrolytic cells.

*Homework coverage (you should be able to all problems in the given ranges):
*
For those of you using the 14th edition the quiz covers sections
20.1-20.9 and homework problems 20.1-20.119

For those of you using the 13th edition the quiz covers sections
20.1-20.9 and homework problems 20.1-20.119

For those of you using the 12th edition the quiz covers sections
20.1-20.9 and homework problems 20.1-20.120

For those of you using the 11th edition the quiz covers sections
20.1-20.9 and homework problems 20.1-20.121

*For the on-line homework:

*Do ch 19(19.3-19.9) tutorial set and homework review problem set.
The due dates were pointed out in a previous e-mail.  There is no
DSM question set.  Also, there are the practice exercise #1
problems for Ch 19 (which are not for credit).

Review section 4.4 (Redox Reactions).  It would also be a good idea to
do homework problems 4.9, 4.45-4.52 (4.9, 4.45-4.52 in the 11th edition
and 4.45-4.51 in 10th edition).  Also, see the following worksheet for
additional practice on oxidation numbers.

http://chemistry.osu.edu/~rzellmer/chem1220/homewk/oxnum.pdf



Dr. Zellmer
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