Is it true that sodium can displace copper from copper sulphate solution?

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Is it true that sodium can displace copper from copper sulphate solution?

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(k,Na,,Ca,Mg,Al,C,Zn,Fe,Pb,H,Cu,Hg,Ag,Au… this is the the reactivity series starting with the most reactive so sodium will displace copper from its sulphate solution as it is more reactive than it.

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Well yes, it makes sense in theory since sodium is above copper in the reactivity series. However, in practice if you put a piece of sodium into a solution of copper sulphate it would float on the surface, and I’m sure the most likely reaction would be with the water which is present anyway in a much greater amount than the copper ions. i.e. 2Na + 2H2O –> 2NaOH + H2 Then the hydroxide ions will react with the Cu2+ ions to produce a pale blue precipitate of copper(II) hydroxide.

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