<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<tt>Quiz 4 will cover the following: </tt><tt><b>Ch 15 (15.7) </b></tt><tt><b>&
Ch 16 (16.1-16.5)<br>
</b></tt><tt><br>
</tt><b><tt><b>Section 15.7: Le Chatelier's Principle </b><b><br>
</b><b> </b><br>
</tt></b><tt>Understand how changing conc. shifts a reaction <br>
(<b>AWAY from ADDED, TOWARD REMOVED</b>). Remember adding or
removing<br>
(small amounts, but not all) of a pure solid or pure liquid will<br>
not shift a reaction. Removing all of a pure solid or pure liquid<br>
will shift the reaction (toward the removed substance - you have
to<br>
have some of the solid or liquid to be at equilibrium when they
are<br>
present in the rxn). Adding or removing a pure liquid which is
also<br>
the solvent will cause a shift due to an indirect effect (e.g.
adding<br>
solvent decreases the conc.of the solutes causing the reaction to<br>
shift toward more moles in solution, similar to what happens for
gases<br>
when the volume is inc.). Conc. changes do <b>NOT</b> affect the
numerical<br>
value of K.<br>
<br>
Know how changing pressure (due to volume changes) effects a
reaction. <br>
Increasing pressure (by reducing the volume) shifts the reaction
toward <br>
fewer moles of gas. Decreasing pressure (by inc. the volume)
shifts <br>
the reaction toward more moles of gas. Changing volume for a gas
is<br>
essentially changing the concentration of the gases. Decreasing
volume<br>
increases the conc. of the gases and shifts the reaction to the
side<br>
with fewer moles in solution (remember, a gas mixture is a
solution).<br>
Pressure changes do NOT affect the numerical value of K. <br>
<br>
Remember, adding an inert (non-reacting) gas to a reaction
involving<br>
gases will increase the total pressure but will NOT cause a shift
in<br>
the reaction because the partial pressures of the gases involved
in<br>
the reaction do not change.<br>
<br>
Something similar also occurs in reactions taking place in a
liquid solution<br>
environment. When the volume of solution changes the reaction will
shift<br>
if there is a change in moles of dissolved solutes. If the volume
is<br>
increased by adding solvent (decreasing conc.) the reaction shifts
toward<br>
more moles of solutes. This is like decreasing pressure by inc.
volume for<br>
gases, the reaction shifts toward more moles of gas.<br>
<br>
Also, know how changing temperature shifts a reaction AND changes
the numerical<br>
value of the equilibrium constant, K (changing conc. and pressures
do not affect<br>
the numerical value of K). How does the change in the forward and
reverse rate<br>
constants (rates) cause the shift in the equilibrium and affect K
for both<br>
exothermic and endothermic reactions? Remember, temperature
changes have a<br>
bigger affect on reactions with bigger Ea.<br>
</tt><b><tt><br>
<tt><tt><tt><b>Homework coverage (you should be able to all
problems in the given ranges)</b><b>:<br>
<br>
</b></tt></tt></tt></tt></b><tt><tt><tt><tt>For those of
you using the 14th edition the quiz covers sections 15.7<br>
You should be able to do homework problems 15.10-15.12,
15.61-15,70,<br>
15.86, 15.88, 15.90-15.91, 15.93-15.94, 15.95-15.97,
15.99-15.100<br>
<br>
For those of you using the 13th edition the quiz covers
sections 15.7<br>
You should be able to do homework problems 15.10-15.12,
15.61-15,68,<br>
15.84, 15.86, 15.88-15.89, 15.91-15.92, 15.93-15.95,
15.97-15.98<br>
<br>
For those of you using the 12th edition the quiz covers
sections 15.7<br>
You should be able to do homework problems 15.10-15.12,
15.61-15,68,<br>
15.84, 15.86, 15.88-15.89, 15.91-15.92, 15.93-15.95,
15.97-15.98<br>
<br>
For those of you using the 11th edition the quiz covers
sections 15.7<br>
You should be able to do homework problems 15.8-15.10,
15.51-15,56,<br>
15.72, 15.75-15.76, 15.78-15.79, 15.80, 15.82-15.87<br>
</tt></tt></tt> </tt><br>
<tt><b><tt><b>For the on-line homework:</b></tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt><b>For Credit:</b></tt><tt><br>
</tt></b><tt>Ch 15 (15.7) Tutorials 2</tt><tt><br>
</tt><tt>and Ch 15b (15.7) Homework Review.</tt><tt><br>
</tt><tt><br>
</tt><tt>Make sure you can do the assigned textbook questions, the
tutorials and the homework</tt><tt><br>
</tt><tt> review questions.</tt><tt><br>
</tt><tt><br>
</tt><tt>NOT for credit:</tt><tt><br>
</tt><tt> DSM module (Key General Chemistry Skills Advanced
Equilibrium)</tt><tt><br>
</tt><tt> which covers this material.<br>
<br>
</tt></tt><br>
<tt><tt><tt><b>Chapter 16 (16.1-16.5)<br>
</b></tt></tt></tt><br>
<tt><tt><tt><tt>Acids and bases (Arrhenius and Bronsted-Lowry
theory),</tt><tt><br>
</tt><tt> conjugate acid/base pairs, autoionization of water,
K</tt><tt><sub>w</sub></tt><tt>, pH, pOH,</tt><tt><br>
</tt><tt> strong acids and bases and weak acids and bases.
You MUST</tt><tt><br>
</tt><tt> know the 7 common strong acids and the strong bases
(those</tt><tt><br>
</tt><tt> discussed in the book, notes, class and on the class
web page).<br>
Also, you need to know the strong bases discussed in
lecture.<br>
</tt><tt> </tt><tt> All other acids or bases you see will be
weak acids or bases</tt><tt><br>
</tt><tt> (unless told otherwise). You need to be able to do
calculations</tt><tt><br>
</tt><tt> for strong acids and bases.<br>
</tt></tt></tt></tt><br>
<tt><tt><tt><tt><b><tt><tt><tt><tt><b>Homework coverage (you should
be able to all problems in the given ranges)</b><b>:<br>
<br>
</b></tt></tt></tt></tt></b><tt><tt><tt><tt>For
those of you using the 14th edition the quiz covers
sections 16.1-16.5<br>
You should be able to do homework problems 16.1(a),
16.2-16.4, 16.13-16.48,<br>
16.100, 16.104,16.106, 16.116-16.118<br>
<br>
For those of you using the 13th edition the quiz
covers sections 16.1-16.5<br>
You should be able to do homework problems 16.1(a),
16.2-16.4, 16.13-16.48,<br>
16.100, 16.102, 16.104, 16.106, 16.116-16.118<br>
<br>
For those of you using the 12th edition the quiz
covers sections 16.1-16.5<br>
You should be able to do homework problems 16.1(a),
16.2, 16.5, 16.11-16.48,<br>
16.106, 16.108, 16.115-16.117<br>
<br>
For those of you using the 11th edition the quiz
covers sections 16.1-16.5<br>
You should be able to do homework problems 16.1(a),
16.2, 16.13-16.50,<br>
16.110, 16.112, 16.121-16.123<br>
</tt></tt></tt></tt></tt></tt></tt></tt><br>
<tt><tt><tt><tt><b><tt><tt><tt><tt><b><tt><b><tt><b>For the on-line
homework:</b></tt><tt><br>
</tt><tt> </tt><tt><br>
</tt><tt><b>For Credit:</b></tt><tt><br>
</tt></b></tt></b></tt></tt></tt></tt></b><tt><tt><tt><tt><tt><tt>Ch
16 (16.1-16.5) Tutorials 1</tt><tt><br>
</tt><tt>and Ch 16a (</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>16.1-16.5</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>)
Homework Review.</tt><tt><br>
</tt><tt><br>
</tt><tt>Make sure you can do the assigned
textbook questions, the tutorials and the
homework</tt><tt><br>
</tt><tt> review questions.</tt><tt><br>
</tt><tt><br>
</tt><tt>NOT for credit:</tt><tt><br>
</tt><tt> DSM module (Key General Chemistry Skills
Advanced Acids and Bases)</tt><tt><br>
</tt><tt> which covers this material.<br>
<br>
<br>
Dr. Zellmer</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>
</body>
</html>