Redox reactions are the combination of reduction and oxidation reactions. The type of reaction in which there is loss of electrons is known as oxidation. The type of reaction in which there is gain of electrons is known as reduction. The electron lost by an atom is gained by another such that no electrons are present in the final reaction. Reducing agent is the one which lose electrons while an oxidizing agent gain electron. In oxidation, there is increase in oxidation state while in reduction there is decrease in oxidation state.
In acidic medium, water is added to balance the O atom and H+ are added to balance the H atoms. Consider the given reaction.
The oxidation state of S changes from +4 to +6. So, it is an oxidation reaction. Write the oxidation half reaction.
The oxidation state of Mn changes from +7 to+2. So, it is a reduction reaction. Write the reduction half reaction.
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