QUÍMICA VERDE ME PROL DO MEIO AMBIENTE: UMA PROPOSTA DE AULA PRÁTICA PARA ENSINO MÉDIO

Abstract

The green chemistry is a segment of chemistry that focuses on mitigating or ending the use of polluting substances, as well as recovering the quality of the environment. With the growing industrial advance, chemistry has become a key science for increasing production chains and consequently meeting the demands of the population. However, the increased use of chemical products generates toxic residues, pollution, degradation, for the environment. Faced with this problem, the great challenge of green chemistry is to present alternative processes in order to make governments, population, industry aware of the importance of clean technologies aimed at generating less waste and pollutants, as well as the use of alternative and renewable reagents. Thus, the objective of this work is to carry out a theoretical review on the emergence of green chemistry, approaching works already published on the subject. In addition, a form with basic questions on the theme of green chemistry and a practical experimental script were applied to a high school class at a public school in the municipality of Catalão-Goiás. Specifically, a practical class was held to determine the acid/base pH of household substances using red cabbage extract as a natural indicator of these media. With this, we sought to introduce, theoretically and experimentally, the principles of green chemistry in order to raise awareness of the preservation of the environment.