Complete and balance the following reactions-i Cr2O72- - H- - I- -ii MnO4- - NO2 - H- -

(i) Cr_2O_7^2 +H^++I^ #8722; → 2Cr^3+ + 3I_2 + 7H_2O (ii) MnO_4^ +NO_2+H^+→ 2Mn^2+ + 5NO_3^ + 3H_2O ...

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Ion Electron Method

Complete and ...

Question

Complete and balance the following reactions:
(i) ${C r_{2} O_{7}}^{2 -} + H^{+} + I^{-} \to$
(ii) ${M n O_{4}}^{-} + N O_{2} + H^{+} \to$

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Solution

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C r_{2} O_{7}^{2 -} + H^{+} + I^{-} \to C r^{3 +} + I_{2} + H_{2} O

C r_{2} O_{7}^{2 -} + F e_{2}^{+} + H^{+} \to C r^{3 +} + F e^{3 +} + H_{2} O

M n O^{4 -} + S O_{3}^{2 -} + H^{+} \to M n^{2 +} + S O_{4}^{2 -} + H_{2} O

M n O^{4 -} + H^{+} + B r^{-} \to M n^{2 +} + B r_{2} + H_{2} O

F e^{2 +} + M n O_{4}^{-} + H^{+} ⟶

M n O_{4}^{-} + H_{2} O + I^{-} ⟶

{[M n O_{4}]}^{2 -} + H^{+} ⟶

+ {[M n O_{4}]}^{-} + H_{2} O

A

C_{2} {O_{4}}^{- 2} + M n {O_{4}}^{-} + H^{+} ⟶

{C r}_{2} {O_{7}}^{2} + {F e}^{2 +} + H^{+} ⟶

{C r_{2} O_{7}}^{2 -} + I^{-} + H^{+} \to C r^{3 +} + I_{2} + H_{2} O

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