Principais Contribuições da Arrabidaea chica Verlot (Bignoniaceae) como Material Alternativo de Indicador Ácido-Base para Ensino de Química

Abstract

Chemistry teaching still faces significant challenges, especially regarding the lack of didactic resources, the absence of laboratories, and the difficulty students have in connecting theory and practice. In this context, it is necessary to seek accessible and sustainable strategies that promote learning and stimulate students’ interest. Therefore, this study aimed to analyze the main contributions of Arrabidaea chica Verlot (Bignoniaceae), popularly known as pariri, as an alternative acid-base indicator for chemistry teaching. The research was conducted with 3rd-year high school students from José do Patrocínio State School, in Macapá-AP, using a qualitative-quantitative methodological approach. Pre- and post-questionnaires were applied, and theoretical and practical lessons were developed involving the use of the natural extract of A. chica. The results showed that the extract exhibited color variation according to the pH of the solutions, confirming its efficiency as a natural indicator. Furthermore, the use of pariri contributed to more meaningful, contextualized, and sustainable learning, bringing students closer to scientific practice and to the appreciation of natural resources from the Amazon region. Thus, the use of alternative materials such as A. chica represents an important didactic strategy for promoting chemistry teaching that is more dynamic, investigative, and environmentally responsible.