Question

the colour of potassium permanganate gets discoloured when added to acidified solution of ferrous sulphate the following reaction the basis of the type​

Answer 1

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Potassium Permanganate acts as a self indicator, ie it changes color at the end of the titration.For ex. 0.02M solution of KMnO4 is pink. The product of its reduction Mn+2 is nearly colorless, being a very faint pink. During a titration with KMnO4 the purple color of MnO4- is removed as soon as it is added because it is reduced to Mn+2. As soon as the titration is complete, a fraction of a drop of excess MnO4- solution imparts a definite pink color to the solution, indicating that reaction is complete.