El significado de las fórmulas químicas para estudiantes universitarios. El lenguaje químico como instrumento para la construcción de conocimiento

FARRÉ, A.; LORENZO, M. G. .

EDUCACION QUIMICA

Universidad Nacional Autónoma de México

Lugar: México; Año: 2014 vol. 25 p. 14 - 20

1870-8404

In this work we decided to investigate the impact of the chemical language in previous knowledge of a central theme of organic chemistry, structure and reactivity of benzene. We designed a task with open and closed questions to study different aspects of this theme. Students spontaneously resorted to formulas to answer open questions, so it evidenced its use as a cognitive amplifier. It was also found that symbolic level conditioned submicroscopic interpretation. However, formulas did not become an instrument of thought given students? limitations in predicting reactivity. These results permit us to raise again the starting point for planning teaching and reflect on the importance of the chemical language appropriation when learning science.