According to the material's titration classification, Complexometric titration corresponds to which general type?

• A. Complexometric
• B. Acid/Base
• C. Redox
• D. Precipitation

Answer: (D)

Complexometric titration centers on the binding of a metal ion by a chelating agent to form a stable complex. The endpoint is reached when all of the metal ion has been sequestered by the ligand, not by proton transfer, electron transfer, or precipitation of an insoluble salt. This makes it a distinct type of titration focused on complex formation, typically using agents like EDTA and relying on a color change from an indicator coordinated to the metal. Precipitation titrations depend on forming an insoluble solid to drive the endpoint, while acid-base and redox titrations rely on proton transfer and electron transfer, respectively. So the appropriate general type for complexometric titration is Complexometric.