An alternate path to stoichiometric problem solving |
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Authors: | Professor Hans-Jürgen Schmidt |
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Affiliation: | (1) Department of Chemistry, University of Dortmund, Otto-Hahn-Str. 6, 44221 Dortmund, Germany |
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Abstract: | Stoichiometric problem solving has always been a stumbling block for many students in introductory chemistry courses. Research has shown that it is quite common for students to rely on algorithms when doing stoichiometric calculations. In previous studies, students were confronted with simple stoichiometric problems that involved comparing molar masses with simple ratios to one another. It turned out that students very successfully used their own problem-solving strategies. It is typical of these strategies that students describe relations in their own words rather than applying mathematical calculations. In this paper, an alternate path to teaching introductory stoichiometry-based on the results of research-will be discussed. The recommendation given is to use problems of the kind mentioned above which can easily be solved by quick mental calculation. |
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