what is redox reaction?identify the substances oxidised and the substances reduced in the following reaction. 1.Pb3O4+8HCl arrow 3PbCl2+Cl2 +4H2O 2.CuO+H2 arrow Cu +H2O
Answers
Answer:
The chemical reaction in which oxidation and reduction occur simultaneously is called as redox reaction.
Explanation:
1. In the redox reaction, one reactant gets oxidised while the other gets reduced.
2. The reactant which reduces another reactant is known as reductant.
3. The reactant which oxidises another reactant is known as oxidant.
4. A reductant is oxidised by the oxidant.
5. An oxidant is reduced by the reductant.
Chemical Reactions:
1. Pb₃O₄ + 8 HCl ⟶ 3 PbCl₂ + Cl₂ + 4 H₂O
Here,
Lead oxide ( Pb₃O₄ ) is reduced.
Hydrochloric acid ( HCl ) is oxidised.
Pb₃O₄ + 8 HCl ⟶ 3 PbCl₂ + Cl₂ + 4 H₂O
( oxidation )
|____________________↑
|_______________↑
( reduction )
2. CuO + H₂ ⟶ Cu + H₂O
Here,
Copper oxide ( CuO ) is reduced.
Hydrogen ( H₂ ) is oxidised.
CuO + H₂ ⟶ Cu + H₂O
( oxidation )
|____________↑
|___________↑
( reduction )
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