Question

What are five types of redox indicators

Answer 1

A redox indicator is an indicator compound that changes color at specific potential differences. A redox indicator compound must have a reduced and oxidized form with different colors and the redox process must be reversible. Further, the oxidation-reduction equilibrium needs to be reached quickly.

There are two common classes of redox indicators:

• metal complexes of phenanthroline and bipyridine. In these systems, the metal changes oxidation state.
• organic redox systems such as Methylene blue. In these systems, a proton participant in the redox reaction.