8.18   Balance the following redox reactions by ion – electron method 

(c) H_{2}O_{2}(aq)+Fe^{3+}(aq)\rightarrow Fe^{3+}(aq)+H_{2}O(l)

in acidic medium 

Answers (1)

In acidic medium

oxidation half reaction-

Fe^{2+}\rightarrow Fe^{3+}+e^{-}

reduction half reaction-

H_{2}O_{2}+2H^{+}+2e^{-}\rightarrow 2H_{2}O

Balancing the reaction

multiply by 2 on oxidation half-reaction then add it with reduction half reaction

H_{2}O_{2}+2Fe^{2+}+2H^{+}\rightarrow 2Fe^{3+}+2H_{2}O

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