TEACHING-LEARNIG OF STOCHIOMETRIC CALCULATIONS IN CHEMISTRY: PROBLEMS AND PERSPECTIVES
stoichiometry, teaching-learning, contextualization, dimensional analysis
The content of Stoichiometric Calculations has been discussed for a long time in the Chemistry courses. The difficulties presented by students and, why not, by teachers, related to this content are numerous. In this dissertation, some of these difficulties will be addressed, which were considered to be quite relevant in the teaching-learning process of Stoichiometric Calculus. The first sensitive point refers to the lack of contextualization and problematization, which should be well explored by Textbooks, in addition to being clear in teaching practices. The second point refers to the misuse of metaphors and analogies related to the teaching of Stoichiometric Calculus. Then, the difficulties that students present in the development of proportional reasoning were addressed. Finally, we tried to understand to what extent the algebra of quantities and the dimensional analysis are unknown, or not, by the teachers in th e teaching-learning process of Stoichiometric Calculus. For this analysis to be possible, a semi-structured interview, duly recorded and transcribed, will be used.