Question

When KMnO4 solution is titrated with a solution containing Fe2+ ion, the indicator used in this titration is​

Answer 1

Answer:

Titration of Fe2+ with KMnO is an redox titration.

Fe2+ + 7MnO4- + 14H + =Fe3+ + 7Mn2+ +7H2O

violetcolourless

So, phenolpthalein, methyl orange and litmus are all acid base indicators. They can't be used in this redox titration. KMnO4 is a self-indicator changing from violet to colourless.