Acid–Base Titration and the Titration Curve

ChemistryAcids, Bases & TitrationAges 17–18

Add NaOH solution drop by drop from a burette into the acid in an Erlenmeyer flask. The pH-vs-volume graph updates with every drop, showing the sharp pH jump at the equivalence point. Change the strong/weak acid, the concentrations, and the indicator to see why titrating a weak acid needs phenolphthalein rather than methyl orange.