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Oxidation and Reduction

Permanganate ...

Question

Permanganate iron oxidises oxalate ion in acidic medium to give carbon dioxide and manganese (II) ions.Write the skeletal eqn.

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Solution

Dear Student,

The balanced equation for overall reaction is:

$2 M n O 4^{-} + 16 H^{+} + 5 C_{2} {O_{4}}^{2 -} \overset{}{\to} 10 C O_{2} (g) + 2 M n^{2 +} (a q) + 8 H_{2} O (l) O x i d a t i o n h a l f - r e a c t i o n 5 C_{2} {O_{4}}^{2 -} \overset{}{\to} 10 C O_{2} (g) + 10 e^{-} R e d u c t i o n h a l f - r e a c t i o n 2 M n O 4^{-} + 16 H^{+} + 10 e^{-} \overset{}{\to} 2 M n^{2 +} (a q) + 8 H_{2} O (l)$

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Q. Permanganate solution reacts with the oxalate ion in acidic medium and forms manganese(II) ion and carbon dioxide. What is the stoichiometric coefficient in front of manganese(II) in the balanced redox equation?

M n O_{4}^{-} + C_{2} O_{4}^{2 -} \to M n^{2 +} + C O_{2}

Q. The reaction of the permanganate ion with the oxalate ion in acidic solution forms manganese(II) ion and carbon dioxide. What is the stoichiometric coefficient in front of manganese(II) in the balanced redox equation?

M n O_{4}^{-} + C_{2} O_{4}^{2 -} \to M n^{2 +} + C O_{2}

Q. The reaction of the permanganate ion with the oxalate ion in acidic solution forms manganese(II) ion and carbon dioxide. What is the stoichiometric coefficient in front of manganese(II) in the balanced redox equation?

M n O_{4}^{-} + C_{2} O_{4}^{2 -} \to M n^{2 +} + C O_{2}

Q. Permanganate (VII) ion,

M n O_{4}^{-}

I^{-}

I_{2}

and gives manganese (IV) oxide

M n O_{2}

in basic medium. The skeletal ionic equation is given as

p M n {O_{4}}_{(a q)}^{-} + x H_{2} O (l) \to r M n O_{2} (s) + s I_{2} (s) + y O H_{(a q)}^{-}

The values of p,q,r and s are:

Q. In the laboratory, manganese (II) salt is oxidised to permanganate ion in aqueous solution by

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