GCSE Combined Science (AQA)

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Displacement Reactions of Metals

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Chemical changes Reactivity of metals

Displacement Reactions of Metals

2:01 Reactions of Metals
Spec 4.4.1.2
Previous Extraction of Metals Next Redox Reactions
  • More reactive metals can displace less reactive metals from their compounds.
  • Example: Magnesium displaces copper from copper sulfate.
  • Reaction: Magnesium + Copper Sulfate ��� Magnesium Sulfate + Copper.
  • Magnesium is more reactive than copper.
  • Adding magnesium to aqueous copper sulfate (blue liquid) causes a reaction.
  • The blue solution fades to colorless, indicating magnesium sulfate formation.
  • Red-brown copper coating forms on remaining magnesium.
  • Magnesium displaces copper in the reaction.
  • This type of reaction is called a displacement reaction.
  • For exams, understand the concept of displacement reactions, specific examples not required.
  • Another example: Calcium displaces iron from iron oxide.
  • Reaction: Calcium + Iron Oxide ��� Calcium Oxide + Iron.
  • Calcium is more reactive than iron.
  • Iron is displaced by calcium, forming calcium oxide and leaving iron alone.

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