Chemistry
Divide the following redox reactions into oxidation and reduction half reactions.
(i) Zn + Pb2+ ⟶ Zn2+ + Pb
(ii) Zn + Cu2+ ⟶ Zn2+ + Cu
(iii) Cl2 + 2Br- ⟶ Br2 + 2Cl-
Hydrogen
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Answer
(i) Zn + Pb2+ ⟶ Zn2+ + Pb
Oxidation : Zn ⟶ Zn2+ + 2e-
Reduction : Pb2+ + 2e- ⟶ Pb
(ii) Zn + Cu2+ ⟶ Zn2+ + Cu
Oxidation : Zn ⟶ Zn2+ + 2e-
Reduction : Cu2+ + 2e- ⟶ Cu
(iii) Cl2 + 2Br- ⟶ Br2 + 2Cl-
Oxidation : Cl2 ⟶ 2Cl- + 2e-
Reduction : 2Br- + 2e- ⟶ Br2
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(d) a liquid that is an oxidizing as well as a reducing agent.
(e) a gas that is an oxidizing as well as a reducing agent.
(f) a solid that is an oxidizing agent.
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