(a) Identify the substances that are oxidised and the substances that are reduced in the following reactions.(i) ZnO(s)+C(s) → Zn(s)+CO(g)
(ii)Cuo(s)+H₂(g) → Cu(s)+H₂O(I)
(b) Name the oxidising and reducing agent in the following reaction:2H₂S+SO₂ → 2H₂O+3S↓
Answers
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9
Answer:
CuO is reduced to Cu, so CuO is the oxidizing agent. H2 is oxidized to H2O, so it is the reducing agent.
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Oxidizing and reducing agents
Explanation:
ZnO(s)+C(s) → Zn(s)+CO(g)
Zinc oxide is reduced to zinc.
Carbon is oxidized to Carbon mono-oxide.
Cuo(s)+H₂(g) → Cu(s)+H₂O(I)
Copper oxide is reduced to Copper.
Hydrogen is oxidized to water.
2H₂S+SO₂ → 2H₂O+3S↓
SO2 oxidizes hydrogen to water. SO2 is the oxidizing agent.
H2S reduces SO2 to S. So H2S is the reducing agent.
An oxidizing agent is a reactant that removes electrons from other reactants during a redox reaction; a reducing agent is an element that loses an electron to an electron recipient in a redox chemical reaction.
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