If the above equation is balanced with integer coefficients, the value of z is ______

Engineering

Chemistry

Balancing of Redox Reaction

Question

$2 {MnO}_{4}^{-} + {bl}^{-} + {cH}_{2} O ⟶ {xl}_{2} + {yMnO}_{2} + z \bar{O} H$

If the above equation is balanced with integer coefficients, the value of z is _______ .

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Reduction half	Oxidation Half
2Mn $O_{4}^{-}$ → 2MnO₂	2I^– → I₂ + 2e^–

$2 {MnO}_{4}^{-} + 4 H_{2} O + 6 e^{-} \to 2 {MnO}_{2} + 8 {OH}^{-} 6 I^{-} \to 3 I_{2} + 6 e^{-}$

$2 {MnO}_{4}^{-} + 6 I^{-} + 4 H_{2} O \to 3 I_{2} + 2 {MnO}_{2} + 8 {OH}^{-}$

⇒ z = 8