The Problems of Chemistry Teachers'and Pre-service Teachers'Conceptions in the Prediction of Electrolysis Products

摘要

The purpose of this study was to search pre-service teachers'and chemistry teachers'conceptions related to electrolysis process by predicting electrolysis products in Nal solution.A questionnaire developed by the researchers and following interviews were adopted for the research.By the methods,the conceptions of the groups were compared.Also,the relationship between their conceptions and explanations of chemistry II textbooks and general chemistry books was examined.From the analysis,it was found that most of the pre-service teachers had difficulties in using standard electrode potential when they predicted products of electrolysis.Most of the chemistry teachers could use standard electrode potential,but it was difficult to understand water electrolysis in redox reaction.The explanations of chemistry II textbooks also contained misconceptions.