EDUCATIONAL PROPOSAL IN CHEMISTRY: AQUEOUS EXTRACT OF BLACK BEAN (Phaseolus vulgaris L.) AS A NATURAL pH INDICATOR IN EVERYDAY BEVERAGES. REMUNOM [Internet]. 2025 Nov. 10 [cited 2025 Nov. 27];20(1):1-16. Available from: https://remunom.ojsbr.com/multidisciplinar/article/view/4865