Gravimetric titration or precipitation titration is a titration technique that determines the concentration of an analyte (the substance being measured) by measuring the mass of a precipitate that forms during the reaction between the analyte and the titrant (the solution of known concentration).

In gravimetric titration, a known mass of the analyte is dissolved in a solvent. A standard solution of the titrant is then added dropwise from a buret while stirring the analyte solution continuously until the reaction is complete. At the equivalence point, the moles of the titrant added are chemically equivalent to the moles of the analyte present in the sample.

The precipitate formed is then filtered, washed to remove any impurities, and dried to a constant mass. The mass of the precipitate is then used to calculate the concentration of the analyte in the original solution.

Gravimetric titration is a highly accurate and precise analytical technique, and it is often used for the determination of the concentration of metals, anions, and other substances that can form precipitates.