Department of Chemistry
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Chem13News@uwaterloo.ca
The use of the demonstration “A Colorful Catalyst” by Meridith Rahman and Kenneth Lyle, Chem 13 News, March 2014 (pages 12 and 13) provides a great opportunity for a problem-solving moment with your class.
Seeking to calculate the percent by mass of the active ingredient in a tablet of zinc mineral supplement, an interesting fact was discovered. The zinc supplement is manufactured by Jamieson Laboratories of Toronto; the label amount is 10 mg zinc.
I heard more than once that some chemistry teachers don’t like to share. I’m not referring to popsicles or spouses, but to self-developed resources: handouts, labs, PowerPoint lessons and the like.
I’m struggling to make peace with phasing out class demonstrations. I am in the middle of the transition from a traditional classroom into a student-centered learning environment.