[CHM 111 Lab] No Prelab this Week and Lab Instructions

[Andrew J. Pounds]

Hello and happy Sunday.   We discovered some issues with the Caffeine 
lab you are doing this week.  While we have been able to make 
modifications to the lab so that you can hopefully get reproduceable 
data, I did not have time to rewrite my prelabs to incorporate the 
changes.  So, I am not goint to require you to do a prelab this week.  I 
will just give everyone those five points when I do the final BlackBoard 
grade tally.

Now -- as far as the lab goes this week.  You need to bring a colorless 
or near colorless soda that contains caffeine.  Mellow Yellow and 
Mountain Dew tend to work great because they have a pretty high caffeine 
content.  Don't bring Sprite!

The modification to the lab is as follows -- the caffeine standard 
solutions will be prepared for you before lab.  You will still have to 
make the solutions for you own soda, but the standards will be in the 
lab already prepared for you to make you spectrophotometric calibration 
curve.

-- 
Andrew J. Pounds, Ph.D.  (pounds at theochem.mercer.edu)
Associate Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627