Balance the following redox reaction: Fe₂O₃ + CO → Fe + CO₂

Correct Answer is : Fe2₂2O3₃3 + 3CO → 2Fe + 3CO2₂2

Fe₂O₃ + CO → 2Fe + 2CO₂

2Fe₂O₃ + 3CO → 4Fe + 3CO₂

Fe₂O₃ + 2CO → 2Fe + 2CO₂

Fe₂O₃ + 3CO → 2Fe + 3CO₂

Correct Answer is : Fe2₂2O3₃3 + 3CO → 2Fe + 3CO2₂2

Test Index

JAMB Chemistry 2023 Paper

Question : 20

Total: 82

_2

_3

_2

Solution:

Concept:

A balanced redox equation has equal numbers of each type of atom on both sides.

Explanation:

Let the coefficients be

a\mathrm{Fe}_2\mathrm{O}_3 + b\mathrm{CO} \rightarrow c\mathrm{Fe} + d\mathrm{CO}_2

Balancing iron:

c = 2a

Balancing carbon:

d = b

Balancing oxygen:

3a + b = 2d

Substitute

d = b

into the oxygen balance:

3a + b = 2b

, so

b = 3a

Choose

a = 1

. Then

b = 3

c = 2

, and

d = 3

The balanced equation is

\mathrm{Fe}_2\mathrm{O}_3 + 3\mathrm{CO} \rightarrow 2\mathrm{Fe} + 3\mathrm{CO}_2

Answer:

Option D:

\mathrm{Fe}_2\mathrm{O}_3 + 3\mathrm{CO} \rightarrow 2\mathrm{Fe} + 3\mathrm{CO}_2

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