Utilización de un modelo analógico para facilitar la comprensión del proceso de preparación de disoluciones. Primeros resultados

Abstract

Students of different educational levels have difficulties with the subject of dissolutions, particularly in the preparation of a dissolution from a more concentrated one. To overcome these obstacles, in this work we introduce a model of squares and points (MSP), and present the results of the didactic experience with university students of an introductory course of General Chemistry. In this study, we obtain information from the performance of the students in the activities and from their replies to a questionnaire. The analysis of the results allows us to introduce improvements in the didactic experience, based on the students' contributions. They expose that the MSP was useful to enhance the understanding of the concentration concept and the process of solutions preparation.