“EDUCATIONAL PROPOSAL IN CHEMISTRY: AQUEOUS EXTRACT OF BLACK BEAN (Phaseolus Vulgaris L.) AS A NATURAL PH INDICATOR IN EVERYDAY BEVERAGES”. Revista Multidisciplinar Do Nordeste Mineiro, vol. 20, no. 1, Nov. 2025, pp. 1-16, https://doi.org/10.61164/z41mha20.