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Comproportionation and disproportionation reactions
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By
K. Pratap
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What are comproportionation and disprortionation reactions? Disproportionation reaction: A disproportionation reaction is a type of redox reaction in which a single chemical species undergoes simultaneous oxidation and reduction, forming two different products with distinct oxidation states. In these reactions, the same element in the reactant is both oxidized and reduced. General Form: 2A p+ ⟶ A n+ +A m+ Where n>p>m, meaning one part of the reactant is oxidized, and another part is reduced. Examples: 1. Decomposition of Hydrogen Peroxide: 2H 2 O 2 ⟶ 2H 2 O+O 2 Oxygen in H 2 O 2 has an oxidation state of −1. It is reduced to H 2 O (oxidation state −2) and oxidized to O 2 (oxidation state 0). 2. Chlorine in Water: Cl 2 +H 2 O ⟶ HCl+HClO Chlorine (Cl 2 , oxidation state 0) is reduced to HCl (−1) and oxidized to HClO (+1). 3. Reaction of Sodium Hypochlorite: 3Cl 2 +6OH− ⟶ 5Cl−+ClO 3 −+3H 2 O Chlorine (0) is reduced to chloride (−1) and oxidized to...