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Potassium Permanganate

What happens ...

Question

What happens when:
(Give chemical equations only)
(i) Acidic potassium permanganate reacts with $F e S O_{4} ?$
(ii) Potassium dichromate reacts with $S n C l_{2}$ in acidic medium?
(iii) Potassium permanganate reacts with $M n S O_{4}$ in neutral medium?

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Solution

(i) $2 K M n O_{4} + 10 F e {S O}_{4} + 8 H_{2} {S O}_{4} \to 2 M n {S O}_{4} + K_{2} {S O}_{4} + {5 F e}_{2} ({S O}_{4})_{3} + {8 H}_{2} O$
(ii) ${3 S n C l}_{2} + K_{2} {C r}_{2} O_{7} + 14 H C l \to 3 {S n C l}_{4} + 2 C r {C l}_{3} + 2 K C l + {7 H}_{2} O$
(iii) $2 K M n O_{4} + 3 M n {S O}_{4} + 2 H_{2} {S O}_{4} \to 5 M n O_{2} + K_{2} {S O}_{4} + 2 H_{2} {S O}_{4}$

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