Displacement reactions (Edexcel GCSE Chemistry): Flashcards

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Displacement reactions
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What do displacement reactions compare?

Reactivity of metals

Alternative name for displacement reactions

REDOX reactions

Key principle of displacement reactions

More reactive displaces less reactive element

Oxidation definition

Loss of electrons

Reduction definition

Gain of electrons

Which metal is oxidised in displacement reactions?

More reactive metal

Which metal is reduced in displacement reactions?

Less reactive metal

Zn+CuSO4Zn + CuSO_4 products

ZnSO4+CuZnSO_4 + Cu

Observation: Zn+CuSO4Zn + CuSO_4 reaction

Reddish-brown Cu forms, blue colour fades

Cu+ZnSO4Cu + ZnSO_4 result

No reaction

Why Cu can't displace Zn from ZnSO4ZnSO_4

Cu less reactive than Zn

What reactivity series predicts

Which metals can displace others

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