Redox Titration Definition (Chemistry)

Chemistry Glossary Definition of Redox Titration

Many titration are acid-base titration, but redox reactions may be titrated as well.
Many titration are acid-base titration, but redox reactions may be titrated as well. Spencer Grant / Getty Images

A redox titration is a titration of a reducing agent by an oxidizing agent or titration of an oxidizing agent by a reducing agent. Typically, this type of titration involves a redox indicator or a potentiometer.

Example Set-Up

For example, a redox titration may be set up by treating an iodine solution with a reducing agent to form the iodide. A starch solution can then be used as a color-change indicator to detect the titration endpoint. In this case, the solution begins blue and disappears at the endpoint when the iodine is all reacted.

Types of Redox Titrations

Redox titrations are named according to the titrant that is used:

  • Bromometry uses a bromine (Br2) titrant.
  • Cerimetry employs cerium(IV) salts.
  • Dichrometry uses potassium dichromate.
  • Iodometry uses iodine (I2).
  • Permanganometry uses potassium permanganate.