Balance the following equations- AsO3-3 - MnO-4 - AsO3-4 - MnO2 -H2O Acid medium

The correct option is A 3AsO^3 _3 + 2MnO^ _4 + 2H^ → 3AsO^3 _4 + 2MnO_2 +H_2O The unbalanced redox equation is as follows: AsO^3 _3 + MnO^ _4 #160; ...

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Standard XII

Chemistry

Catalytic Hydrogenation

Balance the f...

Question

Balance the following equations:

$A s O_{3}^{3 -} + {M n O}_{4}^{-} \to A s O_{4}^{3 -} + M n O_{2} + H_{2} O$ (Acid medium)

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

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

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

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Solution

The correct option is A $3 A s O_{3}^{3 -} + 2 {M n O}_{4}^{-} + 2 H^{-} \to 3 A s O_{4}^{3 -} + 2 M n O_{2} + H_{2} O$
The unbalanced redox equation is as follows:
$A s O_{3}^{3 -} + {M n O}_{4}^{-} \to A s O_{4}^{3 -} + M n O_{2} + H_{2} O$
All atoms other than H and O are balanced.
The oxidation number of As changes from +3 to +5. The change in the oxidation number of As is +2.
The oxidation number of Mn changes from +7 to +4. The change in the oxidation number of Mn is 3.
The increase in the oxidation number is balanced with decrease in the oxidation number by multiplying
$A s O_{3}^{3 -}$ and $A s O_{4}^{3 -}$ with 3 and multiplying $M n O_{4}^{-}$ and $M n O_{2}$ with 2.
$3 A s O_{3}^{3 -} + 2 {M n O}_{4}^{-} \to 3 A s O_{4}^{3 -} + 2 M n O_{2} + H_{2} O$
O atoms are balanced.
$3 A s O_{3}^{3 -} + 2 {M n O}_{4}^{-} \to 3 A s O_{4}^{3 -} + 2 M n O_{2} + H_{2} O$
Hydrogen atoms are balanced by adding 2 $H^{+}$ atoms on the LHS.
$3 A s O_{3}^{3 -} + 2 {M n O}_{4}^{-} + 2 H^{+} \to 3 A s O_{4}^{3 -} + 2 M n O_{2} + H_{2} O$
This is the balanced chemical equation.

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Similar questions

Balance the following in basic medium:

A s O_{3}^{3 +} + {M n O}_{4}^{-} \to A s O_{4}^{3 -} + M n O_{2}

Q. Balance the following equation by ion electron method.

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

The complete balanced equation is:

M n O_{2} + H_{2} O_{2} \to {M n O}_{4}^{-} + H_{2} O

(Basic medium)

Balance the following reaction in basic medium.

C_{2} H_{5} O H + {M n O}_{4}^{-} ⟶ C_{2} H_{3} O^{-} + M n O_{2} (s) + H_{2} O

Q. Complete and balance the following chemical equations :
(a)

F e^{2 +} + M n O_{4}^{-} + H^{+} ⟶

(b)

M n O_{4}^{-} + H_{2} O + I^{-} ⟶

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Balance the following equations:AsO3−3+MnO−4→AsO3−4+MnO2+H2O (Acid medium)

Balance the following equations:

$A s O_{3}^{3 -} + {M n O}_{4}^{-} \to A s O_{4}^{3 -} + M n O_{2} + H_{2} O$ (Acid medium)