Electrolysis and redox
2 marks · NormalState what is meant by:
(a)[1 mark]
oxidation, in terms of electron transfer.
(b)[1 mark]
reduction, in terms of electron transfer.
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(a) Oxidation is the loss of electrons.
(b) Reduction is the gain of electrons.
Common mistakes: Describing oxidation/reduction in terms of oxygen or hydrogen only, not electrons.
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Marking points
B1 (a) · 1 mark · Identifies that oxidation is loss of electrons.
B1 (b) · 1 mark · Identifies that reduction is gain of electrons.
Worked solution
a. Oxidation is the loss of electrons.
b. Reduction is the gain of electrons.