Metals below carbon in the reactivity series
2 marks · NormalExplain, using the concept of reduction, what happens to iron ions during extraction from iron(III) oxide.
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Iron(III) ions gain electrons and are reduced to iron atoms.
Also accept: Fe3+ ions gain 3 electrons to become Fe atoms.
Common mistakes: Stating electrons are lost; Saying 'oxidation' instead of 'reduction'
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Marking points
B1 · 1 mark · States that iron(III) ions (Fe3+) gain electrons.
B2 · 1 mark · States that this is reduction or that ions become iron atoms.
Worked solution
During extraction, iron(III) ions (Fe3+) gain electrons and are reduced to form iron atoms (Fe).