A titration curve plots solution pH against the volume of titrant added, revealing the neutralisation profile of an acid-base reaction. This visualiser supports four titration types: strong acid with strong base, weak acid with strong base, strong base with strong acid, and weak base with strong acid. The curve is calculated point-by-point using exact equilibrium expressions, directly from [H⁺] or [OH⁻] for strong acids, the quadratic form of the weak acid dissociation equation before the equivalence point, the Henderson–Hasselbalch equation through the buffer region, and hydrolysis calculations beyond the equivalence point. Key annotations are displayed automatically: the equivalence point volume and pH, the half-equivalence point (where pH = pKa for weak acid titrations), and the initial pH. The steep inflection in the curve marks the equivalence point — the region where a pH indicator should change colour or a potentiometric sensor records maximum rate of pH change. Titration curves are fundamental to analytical chemistry, acid-base chemistry, and buffer design.