Redox titration

Type of titration based on redox reactions

A redox titration is a type of titration based on a redox reaction between the analyte and titrant. It may involve the use of a redox indicator and/or a potentiometer. A common example of a redox titration is treating a solution of iodine with a reducing agent to produce iodide using a starch indicator to help detect the endpoint. Iodine (I2) can be reduced to iodide (I−) by, say, thiosulfate (S2O2−3), and when all iodine is spent the blue colour disappears. This is called an iodometric titration.

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