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