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Byju's Answer

Standard XI

Chemistry

Ion Electron Method

aMnO-4+bH2O2+...

Question

$a M n O_{4}^{-} + b H_{2} O_{2} + c H^{+} \to d M n^{+ 2} + e O_{2} + f H_{2} O$ is a balanced chemical equation. The value of $a, b, c, d, e$ and $f$ are:

2, 1, 6, 2, 3

and

4

respectively

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2, 3, 6, 2, 4

and

6

respectively

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2, 7, 6, 2, 6

and

10

respectively

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None of these

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Solution

The correct option is D None of these
$H_{2} O_{2} \to O_{2} + 2 H^{+} + 2 e^{-} . . . . . (1) M n O_{4}^{-} + 8 H^{+} + 5 e^{-} \to M n^{2 +} + 4 H_{2} O . . . . (2)$
For balancing multiply the equation (1) by $5$ and equation (2) by $2$ . Then add them.
$5 \times [H_{2} O_{2} \to 0_{2} + 2 H^{+} + 2 e^{-}] 2 \times [M n O_{4}^{-} + 8 H^{+} + 5 e^{-} \to M n^{2 +} + 4 H_{2} O]$
____________________________________________
$2 M n O_{4}^{-} + 5 H_{2} O_{2} + 6 H^{+} \to 2 M n^{+ 2} + 5 O_{2} + 8 H_{2} O$

The value of $a, b, c, d, e$ and $f$ are $2, 5, 6, 2, 5, 8$ respectively.

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Similar questions

a M n O_{4}^{-} + b H_{2} O_{2} + c H^{+} \to d M n^{+ 2} + e O_{2} + f H_{2} O

is a balanced chemical equation. The value of

a, b, c, d, e

and

f

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Q. In the following redox reactions, what is the value of

f

I

a M n O_{4}^{-} + b {F e}^{2 +} + c H^{+} ⟶ d {M n}^{2 +} + e {F e}^{3 +} + f H_{2} O

I I

a {C r}_{2} O_{7}^{2 -} + b {F e}^{2 +} + c H^{+} ⟶ d {C r}^{3 +} + e {F e}^{3 +} + f H_{2} O

I I I

a M n O_{4}^{-} + b H_{2} O_{2} + c H^{+} ⟶ d {M n}^{2 +} + e O_{2} + f H_{2} O

Q. For the following balanced equation :

a F e^{2 +} + b C r_{2} O_{7}^{2 -} + c H^{+} ⟶ d F e^{3 +} + e C r^{3 +} +

H_{2} O

The value of a+b+c+d+e+f is :

Balance the following chemical equation by replacing a, b, c, d and electric with appropriate natural numbers.

aS + bHNO₃ 🔜cH₂SO₄ + dNO₂ + eH₂O

Write the sum of a, b, c, d and e

The variable coefficients d, e, f and g are considered for balancing the chemical equation. Relationships between these variable are constructed by balancing the atoms of each element on either side of the reaction. Which of the following are correct?

(Note: Coefficients should be natural numbers.)

(i) 2d= f, d = 3d and e= f + 2g

(ii) 2d = f, 3d = g and 2e = 2f + g

(iii) d = f/2, 2d = g and e = 2f + 2g

(iv) d = 1, e = 3.5, f = 4 and g = 6

(v) d = 2, e = 7, f = 4 and g = 6

(vi) d = 2, e = 7, f = 3 and g = 4

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aMnO−4+bH2O2+cH+→dMn+2+eO2+fH2O is a balanced chemical equation. The value of a,b,c,d,e and f are:

$a M n O_{4}^{-} + b H_{2} O_{2} + c H^{+} \to d M n^{+ 2} + e O_{2} + f H_{2} O$ is a balanced chemical equation. The value of $a, b, c, d, e$ and $f$ are: