A button cell used in watches functions as following
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A button cell used in watches functions as following
Zn(s)+Ag2O(s)+H2O(l)⇌2Ag(s)+Zn2+(aq)+2OH−(aq) If half cell potentials are Zn2+(aq)+2e−→Zn(s);Eo=−0.76V Ag2O(s)+H2O(l)+2e−→2Ag(s)+2OH−(aq),Eo=0.34V The cell potential will be -