Question

WHAT WILL HAPPEN IF:-

1) ZINC (in solid form) is added to a solution which is a mixture of IRON SULPHATE AND COPPER SULPHATE.
2)ALUMINUM(in solid form) is added to a solution which is a mixture of ZINC SULPHATE AND IRON SULPHATE.

Answer 1

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1) Zinc is more reactive than copper. on adding zinc to CuSO4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution. This is indicated by colour change from blue to colourless.
Zn(s) + CuSO4(aq) ----> Cu(s) + ZnSO4 (aq).
When zinc is added to iron sulphate solution it displaces the iron from iron sulphate solution.
ZnS +FeSO4 ---->ZnSO4 +Fe
2) Aluminium displaces Zn from zinc sulphate solution, and Fe from ferrous sulphate solution.