Timsy dropped iron nail into copper sulphate solution . He observed certain changes after few hours. Can you tell what changes did he observe?
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Iron nails become brownish in colour and the blue colour of copper sulphate solution fades. This is because iron displaces copper from copper sulphate solution and forms ferrous sulphate which is colourless.
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Blue colour copper sulphate solution changed to green colour of ferrous sulphate
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