Displacement reactions involving metal oxides
3 marks · EasyState the meaning of "reduction" in terms of oxygen.
What is a reducing agent?
In the reaction: , identify the oxidising agent.
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(a) Reduction is the loss of oxygen.
(b) A reducing agent is a substance that removes oxygen from another substance.
(c) Copper(II) oxide
Common mistakes: Reversing reduction/oxidation terminology; Not identifying agent correctly
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Marking points
B1 (a) · 1 mark · Gives correct definition of reduction (loss of oxygen)
B2 (b) · 1 mark · Defines reducing agent correctly (removes oxygen from another substance)
B3 (c) · 1 mark · Identifies copper(II) oxide as the oxidising agent
Worked solution
(a) Reduction is the loss of oxygen. (b) A reducing agent removes oxygen from another substance. (c) Copper(II) oxide acts as the oxidising agent in this reaction.