How to reaction zinc to copper??
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When zinc metal is immersed in a solution of 0.1 M aqueous copper(II) sulfate solution copper metal plates out on the zinc. The solution is initially blue in color. A dark coating of copper metal appears on the zinc within two minutes and when 45 minutes have elapsed, there is a thick coat of copper metal powder on the zinc strip and the blue color of the solution has lightened considerably.
Zn(s) + Cu2+(aq) -> Zn2+(aq) + Cu(s)
Zinc atoms are oxidized to Zn2+(aq): Zn(s) -> Zn2+(aq) + 2e- (loss of electrons)
Copper(II) ions are reduced to Cu(s): Cu2+(aq) + 2e- -> Cu(s) (gain of electrons)
This demonstration should also include having students predict whether or not copper will react with ZnSO4(aq).
Cu(s) + Zn2+(aq) -> No reaction
Zinc is a more active metal compare to copper. The Zn2+(aq) ions do not serve as a reducing agent.
Zn(s) + Cu2+(aq) -> Zn2+(aq) + Cu(s)
Zinc atoms are oxidized to Zn2+(aq): Zn(s) -> Zn2+(aq) + 2e- (loss of electrons)
Copper(II) ions are reduced to Cu(s): Cu2+(aq) + 2e- -> Cu(s) (gain of electrons)
This demonstration should also include having students predict whether or not copper will react with ZnSO4(aq).
Cu(s) + Zn2+(aq) -> No reaction
Zinc is a more active metal compare to copper. The Zn2+(aq) ions do not serve as a reducing agent.
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