Grade 12th pass10 grade science
Why does the colour of copper sulphate solution change when an iron nail is dipped into it?
Why does the colour of copper sulphate solution change when an iron nail is dipped into it?
1 Answer
Pawan Prajapati
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.
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