oxidation-reduction reactions are -
- 2C3H6(g) + 9O2(g) → 6CO2(g) + 6H2O(g)
- Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)
For reaction,
- 2C3H6(g) + 9O2(g) → 6CO2(g) + 6H2O(g)
<u>On reactant side</u>:
Oxidation state of Carbon = +2
Oxidation state of Oxygen = 0
<u>On product side:</u>
Oxidation state of Carbon = +4
Oxidation state of Oxygen = -2
Here, carbon's oxidation state is rising from +2 to +4. As a result, it is oxidizing and the oxygen's oxidation state is decreasing from 0 to -2. As a result, it is decreasing.
For reaction,
Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)
<u>When reacting:</u>
Iron's oxidation state is +3.
Carbon's oxidation state is +2.
<u>On product side:</u>
Iron's oxidation state is zero.
Carbon's oxidation state is +4.
Here, carbon's oxidation state is rising from +2 to +4. As a result, it is being oxidized and the iron's oxidation state is changing from +3 to 0. As a result, it is decreasing.
To learn more about oxidation-reduction from given link
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