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Mg+CuSO4---->MgSO4+Cu
Zn+CuSO4---->ZnSO4+Cu
Fe+CuSO4---->FeSO4+Cu
Mg+2AgNO3---->Mg(NO3)2+2Ag
Zn+2AgNO3---->Zn(NO3)2+2Ag
Fe+2AgNO3---->Fe(NO3)2+2Ag
Cu+2AgNO3---->Cu(NO3)2+2Ag
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