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<tt>Quiz 6: <b>Chapter 20 </b></tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt><b>Sections 20.1-20.5:</b> </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt>Understand oxidation states (oxidation numbers), redox
reactions, </tt><tt><br>
</tt><tt>what is oxidized and reduced and what are oxidizing and
reducing </tt><tt><br>
</tt><tt>agents (oxidant and reductant). </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt>Be able to balance redox reactions using the half-rxn
method. </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt>Understand voltaic cells. Remember, oxidation occurs at
the </tt><tt><br>
</tt><tt>anode and reduction at the cathode. Understand the
shorthand </tt><tt><br>
</tt><tt>notation as given in lecture and the notes (and homework </tt><tt><br>
</tt><tt>exercise 20.99 in 12th ed., 20.95 in the 11th ed. and 20.93
</tt><tt><br>
</tt><tt>in the 10th ed.). </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt>Understand cell potentials and standard cell potentials and
</tt><tt><br>
</tt><tt>how the two are related. Understand how to calculate them
</tt><tt><br>
</tt><tt>from reduction potentials. Understand how standard
reduction </tt><tt><br>
</tt><tt>potentials relate to the strengths of oxidizing and
reducing </tt><tt><br>
</tt><tt>agents. You need to know what is meant by standard
conditions </tt><tt><br>
</tt><tt>(1 M for conc of things in soln and 1 atm partial pressures
</tt><tt><br>
</tt><tt>for gases). </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt>Understand how E and delta(G) are related and how E^o and </tt><tt><br>
</tt><tt>delta(G^o) and the equilibrium constant are related and
that </tt><tt><br>
</tt><tt>a negative delta(G^o) and positive E^o indicate a
spontaneous </tt><tt><br>
</tt><tt>rxn and a K > 1. </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt><b>Section 20.6:</b><br>
<br>
Nernst Eqn. You should be able to use this eqn. </tt><tt><br>
</tt><tt>to calculate the E for a cell under nonstandard conditions.
</tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt><b>Sections 20.7 & 20.8:</b><br>
<br>
Batteries and fuel cells and corrosion.<br>
Understand batteries in general, you don't need to memorize<br>
specific batteries. </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt><b>Section 20.9:</b><br>
<br>
Electrolysis, quantitative aspects of electrolysis </tt><tt><br>
</tt><tt>(stoichiometry). What are the differences and similarities
between<br>
voltaic and </tt><tt></tt><tt>electrolytic cells. </tt><tt><br>
</tt><br>
<tt><tt><b>Homework coverage (you should be able to all problems in
the given ranges):<br>
</b></tt> </tt><tt></tt><tt><br>
</tt><tt><tt><tt>For those of you using the 14th edition the quiz
covers sections </tt><tt><br>
</tt><tt>20.1-20.9 and homework problems 20.1-20.119<br>
</tt></tt></tt><br>
<tt><tt>For those of you using the 13th edition the quiz covers
sections </tt><tt><br>
</tt><tt>20.1-20.9 and homework problems 20.1-20.119 </tt><tt><br>
<br>
</tt></tt><tt>For those of you using the 12th edition the quiz
covers sections </tt><tt><br>
</tt><tt>20.1-20.9 and homework problems 20.1-20.120 </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt>For those of you using the 11th edition the quiz covers
sections </tt><tt><br>
</tt><tt>20.1-20.9 and homework problems 20.1-20.121 </tt><tt><br>
</tt><br>
<tt><tt><b>For the on-line homework:<br>
<br>
</b>Do ch 19(19.3-19.9) tutorial set and homework review problem
set.<br>
The due dates were pointed out in a previous e-mail. There is
no<br>
DSM question set. Also, there are the practice exercise #1<br>
problems for Ch 19 (which are not for credit).</tt><tt><br>
</tt> </tt><tt> </tt><tt><br>
</tt><tt>Review section 4.4 (Redox Reactions). It would also be a
good idea to </tt><tt><br>
</tt><tt>do homework problems 4.9, 4.45-4.52 (4.9, 4.45-4.52 in the
11th edition </tt><tt><br>
</tt><tt>and 4.45-4.51 in 10th edition). Also, see the following
worksheet for </tt><tt><br>
</tt><tt>additional practice on oxidation numbers. </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt><a class="moz-txt-link-freetext"
href="http://chemistry.osu.edu/%7Erzellmer/chem1220/homewk/oxnum.pdf">http://chemistry.osu.edu/~rzellmer/chem1220/homewk/oxnum.pdf</a></tt><tt>
</tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt><br>
</tt><tt>Dr. Zellmer</tt>
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