A utilização do teste Kastle Meyer para o desenvolvimento de aprendizagem significativa no ensino de química

Abstract

This study standardizes presents na approach to the teaching of Chemistry addressing the content of acid-base indicators, specifically phenolphthalein making approach in Criminal Expertise, using the Kastle-Meyer technique. This technique is presented as a presumptive test to detect the presence of blood in crime scenes, such as, it can also be called a phenolphthalein test in which it is composed of the mixture of substances such as sodium hydroxide, phenolphthalein, metallic zinc powder, ethyl alcohol and distilled water, and, this mixture forms the Kastle-Meyer test in which it is applied to a sample of possibly blood. The methodology of this research is based on the qualitative approach with theoretical basis and to obtain results was applied theoretical class on the content of acid-base indicator and criminal expertise and practical moment applying the Kastle-Meyer test for blood identification in two samples, along with mixed questionnaire before and after application of content. The application of the research was carried out at the Federal Institute of Education Science and Technology of Amapa for 31 students of the first year of high school. The work also addresses the investigator teaching from the moment it emphasizes the critical thinking of the student, also addressing meaningful learning within the classroom, since, in the, previous knowledge will be used to understand the approach of Chemistry in Criminal Expertise. The results obtained through the application of questionnaires and the application of theoretical and practical classes brought positive points and enabled the development of na innovative theme within the classroom, it is possible to achieve the objective of promoting a proposal for teaching researcher in the classroom.