Calculate the titrant volume needed to reach equivalence and the concentration it reveals.
Titration matches equivalents rather than moles, so a diprotic acid needs twice the titrant volume of a monoprotic one at the same molarity. The half-equivalence volume is where pH equals pK_a. Titration is the standard method for determining an unknown concentration precisely, and the equivalence volume is what the whole measurement turns on.
Acid Base Titration
Equivalents of acid = equivalents of base at the equivalence point
Equivalents of acid = equivalents of base at the equivalence point Titration matches equivalents rather than moles, so a diprotic acid needs twice the titrant volume of a monoprotic one at the same molarity. The half-equivalence volume is where pH equals pK_a.
Titration is the standard method for determining an unknown concentration precisely, and the equivalence volume is what the whole measurement turns on.
This calculator takes 5 inputs: Volume of analyte, Analyte concentration, Titrant concentration, Protons per analyte molecule, Hydroxides per titrant molecule. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.