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Question
What is observed after about 1 hour of adding the strips of copper and aluminium separately to the ferrous sulphate solution filled in two beakers? Name the reaction if any change in colour is noticed. Also, write a chemical equation for the reaction.
Solution
\[\ce{Cu(s) + FeSO4(aq) -> No change will take place}\]
Copper is less reactive than Fe, so Cu cannot displace iron from a ferrous sulphate solution.
No reaction will take place.
\[\ce{2Al(s) + 3FeSO4(aq) -> Al2(SO4)3 + 3Fe(s)}\] (Displacement reaction)
When Al is added to a FeSO4(aq) solution, the green colour of FeSO4(aq) disappears and the Fe is seen setting down as the reaction occurs Al being higher in the reacting series displaces the Fe in FeSO4.
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