Uma proposta teórica-experimental de sequência didática sobre interações intermoleculares no ensino de química, utilizando o teste da adulteração da gasolina e corantes de urucum

Abstract

This paper reports presents the results of a research developed with students of the high school in the Dourados, Mato Grosso do Sul, with the objective of proposing a theoreticalexperimental teaching sequences, potentially significant, approaching the theme Intermolecular Interactions, that it will be showed to the teachers, seeking to contribute for the improvement of the chemistry teaching in the schools. The teaching sequence, was developed with 44 students of the last year of the high school in a public school, tends the duration of 9 classes of 50 minutes. The methodology presents the characteristics of the qualitative research, being permeated by David Ausubel's theoretical. We used as advance organizer, the test determination of the ethanol content in gasoline, adapting, along the experiments, to the use of the natural dyes of the urucum seeds thoroughly used through that research was done. The instruments used for collection of information was through the use of questionnaires and observations of the classes. At the end 32 students presented arguments, developing to each stage, as in participation, as in the discussion in room, evidencing the evolution conceptual the process of significant learning.