Q. 213.7( 3 Votes )

Why is HCl not used to make the medium acidic in oxidation reactions of KMnO4 in acidic medium?
A. Both HCl and KMnO4 act as oxidising agents.

B. KMnO4oxidisesHCl into Cl2 which is also an oxidising agent.

C. KMnO4 is a weaker oxidising agent than HCl.

D. KMnO4 acts as a reducing agent in the presence of HCl.

Answer :

KMnO4 oxidises HCl to Cl2 which is also an oxidizing agent. So,some amount of KMnO4 gets used up in oxidizing Cl- to Cl2, thereby rendering the whole titration useless.


KMnO4 + HCl KCl + MnCl2 + Cl2 + H2O

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