Acid-base indicators produced with low cost materials for use in Chemistry Teaching. Research, Society and Development, [S. l.], v. 8, n. 8, p. e45881257, 2019. DOI: 10.33448/rsd-v8i8.1257. Disponível em: https://ojs34.rsdjournal.org/index.php/rsd/article/view/1257. Acesso em: 28 jun. 2025.