Displacement reactions involving metal oxides
4 marks · NormalRead each definition and answer the following:
State what is meant by oxidation and reduction in terms of oxygen.
Define the terms oxidising agent and reducing agent.
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(a) Oxidation is the gain of oxygen; reduction is the loss of oxygen.
(b) An oxidising agent gives oxygen or causes oxidation; a reducing agent removes oxygen or causes reduction.
Common mistakes: Mixing up definitions of agents
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Marking points
B1 (a) · 1 mark · Defines oxidation as gain of oxygen.
B2 (a) · 1 mark · Defines reduction as loss of oxygen.
B3 (b) · 1 mark · Defines oxidising agent as a substance that provides oxygen or causes oxidation.
B4 (b) · 1 mark · Defines reducing agent as a substance that removes oxygen or causes reduction.
Worked solution
a) Oxidation is the gain of oxygen. Reduction is the loss of oxygen.
b) An oxidising agent provides oxygen to another substance or causes it to be oxidised. A reducing agent removes oxygen from another substance or causes it to be reduced.