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30/10/2020 12:42 pm
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Why does the colour of copper sulphate solution change when an iron nail is dipped into it?
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30/10/2020 12:43 pm
In this reaction, iron displaces copper from copper sulphate solution. The deep blue colour of copper sulphate solution fades due to the formation of light green solution of iron sulphate. A red-brown coating of copper metal is formed on the surface of the iron metal. This displacement reaction occurs because iron is more reactive than copper.