Write chemical reactions to justify that hydrogen peroxide can function as an oxidising as well as reducing agent.

Asked by Abhisek | 1 year ago |  61

##### Solution :-

Hydrogen peroxide acts as an oxidizing agent as well as reducing agent in both alkaline medium and acidic medium.

The reaction which are involved in oxidizing actions are:

(i)  $$Mn^{2+}+H_{2}O_{2}\rightarrow Mn^{4+}+2OH^{-}$$

(ii) $$2Fe^{2+}+H_{2}O_{2}\rightarrow 2Fe^{3+}+2OH^{-}$$

(iii) $$2Fe^{2+}+2H^{+}+H_{2}O_{2}\rightarrow 2Fe^{3+}+2H_{2}O$$

(iv) $$PbS+4H_{2}O_{2}\rightarrow PbSO_{4}+4H_{2}O$$

The reaction which are involved in reduction actions are:

(i) $$I_{2}+H_{2}O_{2}+2OH^{-}\rightarrow 2I^{-}+2H_{2}O+O_{2}$$

(ii) $$2MnO^{-}_{4}+3H_{2}O_{2}$$

$$\rightarrow 2MnO_{2}+3O_{2}+2H_{2}O+2OH^{-}$$

(iii) $$2MnO^{-}_{4}+6H^{+}+5H_{2}O_{2}$$

$$\rightarrow 2Mn^{2+}+8H_{2}O+5O_{2}$$

(iv) $$HOCl+H_{2}O_{2}\rightarrow H_{3}O^{+}+Cl^{-}+O_{2}$$

Answered by Pragya Singh | 1 year ago

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