“EVALUATION OF HIBISCUS AND ROSE FLOWER EXTRACTS AS ECO FRIENDLY NATURAL PH INDICATORS FOR ACID–BASE TITRIMETRIC ANALYSIS ”. Phoenix: International Multidisciplinary Research Journal ( Peer Reviewed High Impact Journal ), vol. 4, no. 2, May 2026, pp. 112-5, https://doi.org/10.65009/3cexr250.