Metal electrode dipping into an aqueous solution of its ions

2 Metal electrode dipping into an aqueous solution of its ions 

Typical examples are Cu(s) Cu +(aq), Zn(s) Zn +(aq), Sn(s) Sn (aq), Pb(s) Pb (aq), Ag(s) Ag (aq). The reactions occurring again depend on the other electrode in the electrochemical cell. The species in solution which appears in the electrode reaction is the species with respect to which the electrode is reversible. In general when the electrode functions  

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