The reactivity series, displacement reactions, and electrolysis of molten and aqueous compounds.
The reactivity series ranks metals; electrolysis uses electricity to split compounds.
The reactivity series
From most to least reactive: potassium, sodium, calcium, magnesium, aluminium, (carbon), zinc, iron, (hydrogen), copper, silver, gold. A more reactive metal displaces a less reactive one from its compound.
Worked example. — zinc displaces copper.
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