What do you understand by displacement reactions? What happens when copper sulphate
reacts with zinc? Explain this reaction also.
Answers
Answer:
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(1)What do you understand by displacement reactions?
(A) Displacement reactions occur when metal from the electrochemical series is mixed with the ions of metal lower down in the electrochemical series. The atoms of the more reactive metal push their electrons on to ions of the less reactive metal.
Example: CuSO4(aq)+Zn(s)→ZnSO 4 +Cu
When a strip of zinc metal is placed in a copper sulphate solution, then zinc sulphate solution and copper are obtained. In this reaction, zinc displaces copper from the copper sulphate compound so that copper is set free. The blue color of the copper sulphate solution fades due to the formation of zinc sulphate.
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(2)What happens when copper sulphate reacts with zinc? Explain.
(A) When zinc is added to copper sulphate (CUSO4) solution due to more reactivity of zinc, cooper is replaced by zinc and forms zinc sulphate. During the process, the color of the solution changes from blue to colorless.
The chemical equation of the reaction,
Zn + CuSO4 → ZnSO4 + Cu
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