Zinc is more reactive than copper. Hence it displaces copper from copper sulphate solution as follow:
Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)
Thus, zinc reacts with CuSO4 solution. Hence we cannot store copper sulphate solution in a zinc pot. Alternatenely,
E°zn2+/Zn = 0.76 V
E°Cu2+ /Cu = 0.34 V
To check whether the reaction will take place or not, we have to find out EMF of this cell
Zn(s) + CuSO4 (aq) → ZnSO4 (aq) + Cu(s)
Cell Zn/Zn2+ || Cu2+/Cu
E°Cell = E°(Cathode) – E°(Anode)
= 0.34V – ( -0.76V)
E°Cell = + 1.10 V
As E°Cell is positive, so the reaction will take place. Hence we cannot store copper sulphate in a zinc pot.
