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CBSE Class 8 Answered

(i) Why does the colour of copper sulphate solution change when an iron nail is kept immersed in it? What is the change in colour observed? (ii) What happens to the iron metal?
Asked by Topperlearning User | 30 Apr, 2014, 03:15: PM
answered-by-expert Expert Answer

(i) Iron metal is more reactive than copper. Therefore, it displaces copper from copper sulphate solution (CuSO4). The deep blue colour of copper sulphate solution fades due to the formation of light green solution of iron sulphate.

(ii) A red-brown coating of copper metal is formed on the surface of iron nail.

Answered by | 30 Apr, 2014, 05:15: PM

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