exp 17 - average deviation for "k"

[robert zellmer]

On the report sheet on page 125 for exp 17 you list the 4 rate constants
for the 4 solutions.  Then you are supposed to take an average and
calculate the average deviation.  Technically you should also check to
see if you should include all four rate constants in the average (i.e.
is one of them really different than the other three).  To do this you
should do an error analysis.

All of this is explained in the following link (which I sent previously
in an e-mail about exp 16),

*Treatment of Numerical Data (Error Analysis, sig. fig., graphing)* 
<http://chemistry.osu.edu/%7Erzellmer/chem1220/lab/App_D_122_lab_manual.pdf>

This link can be found at my "Laboratory" link.  If it's questionable which
graph (1st or 2nd order) has more parallel lines you can calculate the
average deviation for the rate constants for each graph.  That can help
decide which set of lines might be more parallel.

Of course all of this depends on you calculated things correctly, especially
your initial conc. of Cr^3+ in each solution (remember, the 4 solns should
have different [Cr^3+]_o).  I've seen data or spoken to 4 people just today
who've made such mistakes.

Dr. Zellmer
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osu.edu/pipermail/cbc-chem1250/attachments/20160331/0843b020/attachment.html>