Question

Observe the action of Zn, Fe, Cu and Al metals on salt solutions-:.(1)ZnSO4 (2)FeSO4 (3)Al2(SO4)3. explain breifly.
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Answer 1

Answer:

1)Fe :-

no react would occur as iron is less reactive than zinc and does not replace zinc from zinc sulphate solution.

AL:-

Al + ZnSo4 ----→  Al2(So4)3 +Zn

Aluminum being more reactive than zinc displaces zinc from ZnSo4 and form AlSo4 and Zn  

Cu:-

no reaction would occur as copper is less reactive than zinc

2)Zn:-

the zinc metal will displace iron from iron sulphate solution as it is more reactive than iron and form zinc sulphate and iron metal deposits is seen

the colour of the solution changes from green to colourless

Zn + FeSO4 → ZnSO4 + Fe

Cu:-

no reaction would occur as copper is less reactive than iron

AL:-

the aluminum metal is more reactive than iron and forms aluminum sulphate and iron metal deposits is observed

3)Zn,Cu,Fe would not displace aluminum form aluminium sulphate solution as aluminium is more reactive than Fe,Zn,Cu.

Explanation: