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CURCUMINA COMO INDICADOR NATURAL DE PH: UMA ABORDAGEM TEÓRICA-EXPERIMENTAL PARA O ENSINO DE QUÍMICA

2020; Brazilian Chemical Society; Linguagem: Inglês

10.21577/0100-4042.20170625

1678-7064

Daniella Campos Oliveira, Leonardo Alexandre Barros Bezerra, Romário Jonas de Oliveira, Vitocley de Moraes, Juliana Angeiras Batista da Silva, João de Freitas Filho, Juliano Carlo Rufino Freitas, Clécio S. Ramos,

Chemistry Education and Research

TEACHING.This paper proposes the development of a simple experiment with easily accessible and low cost materials, enabling its practice with or without laboratory infrastructure, with feasibility for computational theoretical study.On the other hand, the objective of the work is to develop a chemical experiment that demonstrates that the chromophore curcumin (natural indicator) is responsible for indicating the acidity or basicity of a given solution.The experiment has different applicability, being useful in the approach of different chemical contents, showing potential for multi and interdisciplinary approaches.Subjects such as tautomeric equilibrium, chromophoric compounds, hydrogen potential, UV-Vis electron absorption spectra analysis and molecular modeling are explored.