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Two Suggestions for Improving Chemical Equilibrium Instruction

Published on Jan 1, 2013
David Yaron21
Estimated H-index: 21
,
James G. Greeno46
Estimated H-index: 46
+ 1 AuthorsGaea Leinhardt36
Estimated H-index: 36
Abstract
Two suggestions for instruction in chemical equilibrium are presented along with the evidence that supports these suggestions. The first suggestion relates to the indirect 10 connection between chemical reactions, written as rules for how reactant species are converted to product species, and the effects of reactions on concentrations, which result from application of this rule to collections of chemical species. This connection is obvious for experts and so instructors may not recognize the need to make this connection explicit to students. The second suggestion is the use of the majority and 15 minority species (M&M) strategy to analyze chemical equilibrium systems. The argument is made that reasoning about equilibrium systems necessarily involves a twophase analysis, and the M&M strategy makes these two phases explicit for students.
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