exp 16 pre-lab

[Robert Zellmer]

As always, before attempting the pre-lab you should read the Discussion
section and review the calculations.  Write the procedure so you have some
idea where the numbers are coming from. Watching the video at home
before writing the procedure will help.  It will give you better idea of 
what's
going on so the procedure makes sense.  The procedure MUST be written
in your own words in an outline form similar to my example on the last
page of the syllabus (and found at a link 
<http://chemistry.osu.edu/%7Erzellmer/chem1250/lab/notebook_proc.pdf>on 
my class web page).  Pay
attention to the equations and the examples in the manual since the
calculations you'll be doing are very similar.

The pre-lab essentially consists of two parts.  The first part starts with
a video, which you need to watch all the way through (including the
credits) or you will have have points deducted.  Then there is a series
of questions dealing with the discussion and procedure in the manual
and the video.

Below this part is the data-entry part of the pre-lab. You'll be given
numbers similar to what you'll obtain in the actual experiment. You will
then do the appropriate calculations and enter the numbers (make sure
you have the correct sig. fig.).  That's pretty much it.

There is an INSTRUCTIONS button in a red box toward the upper-left of
the page.  Pay attention to what it's telling you to do in terms of 
units, how
to enter the numbers, etc.  If submitted correctly, the program will display
a summary page with all your data and the correct numbers displayed and
send you an e-mail.  If you don't get these two things something may have
gone wrong and you should try again.  If it did work it won't let you do it
again.

*I'll be sending a follow-up e-mail shortly after this one with more 
details.*

The link for the pre-lab is in the syllabus, on Carmen and my web page so
if the following doesn't seem to work from your e-mail you can find it
somewhere.

https://undergrad-ed.chemistry.ohio-state.edu/cgi-test/gc-freezing-pt-depression.pl 



Dr. Zellmer
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