Chemistry 110
Laboratory Report
Caffeine Lab
Name __________________
Safety (7 points)
Lab work is completed. Procedures given in Chemistry Laboratory: Safety, Procedures, and
Emergencies sheet are followed during lab. Lab work areas cleaned.
Data (6 points)
What was your beverage?
_________________________________________
Mass of empty beaker
_______________
Mass of beaker with caffeine
_______________
Sketch and description of caffeine
Other observations
Calculations (6)
Mass of caffeine in 100.0 mL beverage
_______________
Mass of caffeine in one serving of your beverage
(Based on your experimental results.)
Show how you calculated this mass
_______________
Volume of beverage that contains 400 mg of caffeine
Show how you calculated this volume
_______________
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Analysis (3 points)
Discuss why CH2Cl2 does not pass through filter, including the role of intermolecular
attractions.
Discuss why the caffeine leaves the water and moves into the CH2Cl2, including discussion of
the role of intermolecular attractions.
Recently, people have begun selling pure caffeine powder to consumers via the internet. Given
what you have seen in this lab, do you think someone consuming pure caffeine powder would
consume an amount similar to the amount in a caffeinated beverage, more than this, or less than
this? Briefly explain.
Additional Research (3 points)
Do some library research related to the experiment and tell what you learned from this research.
Do not simply copy sentences or paragraphs from the web into your paper, as this is not research.
Select one topic and investigate it in some depth. You might use this article as a starting point:
http://cen.acs.org/content/dam/cen/91/5/09105-caffeine.pdf.
Follow the guidelines in the syllabus for typed submitted work. Two pages maximum. Include
complete citations.
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