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<big><font size="2"><big>For those of you not coming to class I
discussed the<br>
following problem. Just a reminder, I don't have to do<br>
this and sometimes don't. If you don't come to class<br>
you may not get the next problem. You can also find<br>
this at the link sent in the previous e-mail.<br>
<br>
The following is a problem I want you to think about. I
mentioned<br>
this in class and told you to think about it. I will NOT be
giving<br>
the answer and neither will the TAs. You need to work on it
yourself<br>
and come see me or a TA to see if you did it correctly. We
will<br>
tell you yes or no. If you don't have it correct we will give
you<br>
hints but will not tell you how to do it. That is up to you
to figure<br>
out. If you get it correct don't simply give someone else the
answer.<br>
You can help them but only tell them if they are or aren't on
the right<br>
track.<br>
<br>
What you have is the following:<br>
<br>
1) r = k [A]^n (a general rate law)<br>
<br>
2) Experimental data of rate and [A]. For instance:<br>
<br>
rate [A]<br>
---- ---<br>
1.0 1.0<br>
3.0 2.0<br>
4.5 3.0<br>
<br>
Something like that (not actual data). You are not doing<br>
an initial rate problem using this data. I don't even want<br>
you actually using this to get any numbers. It's just an<br>
example of the data you would collect in an experiment.<br>
<br>
3) You can mathematically manipulate the equation in (1) so
you<br>
get a linear equation. Then you can plot something that will<br>
graphically give you k and n in a fairly easy way (somehow
related<br>
to the slope and intercept, not necessarily in that order).<br>
<br>
You do NOT have to do any integration. You won't be using an<br>
integrated rate law. You don't have [A] and time data. You<br>
have rate and [A] data.<br>
<br>
This is NOT an initial rate method problem. That is NOT<br>
how I want you to think about this.<br>
<br>
Think about what you might be able to do mathematically to<br>
the equation in (1) to get a linear equation. Then think<br>
about what you need to plot so that you can get k and n.<br>
<br>
Dr. Zellmer</big></font></big>
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