Question

A piece of zine is dropped in
Copper Sulphite solution
​

Answer 1

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→ A piece of zinc is dropped in Copper Sulphate solution ?

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→ So, here , on adding zinc to CuSO4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution. This is indicated by colour change from blue to colourless. CuSO4 solution has a blue colour while ZnSO4 solution is colourless.

→ Zn(s) + CuSO4(aq)

→ Cu(s) + ZnSO4 (aq)

Answer 2

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A piece of zine is dropped in Copper Sulphite solution?

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When zinc metal piece is added to copper sulphate solution, the colour of CuSO4 solution disappears and colourless zinc sulphate solution is formed.

Solid brown copper is deposited as it displaces by Zn.

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It's a displacement reaction.

It's a redox reaction. Oxidation number of Cu decreases from 2 to 0 so it's reduced. Oxidation number of Zn increases from 0 to 2 so it's oxidised.

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