A button cell used in watches functions as following `Zn(s) + Ag _2 O(s) + H_2 O(l)` `2 A g(s) + Zn^
Channel: Doubtnut
Date: 2020-01-26

A button cell used in watches functions as following `Zn(s) + Ag _2 O(s) + H_2 O(l)` `2 A g(s) + Zn^(2+) (aq) = 2 OH^- (aq)` If half cell potentials are `Zn^(2+) (aq) +2e^- rarr Zn (s) , E^@ =- 0. 76 V` `Af_2 O(s) +H_2 O (l) +2e^- rarr` `2Ag(s) + 2OH^- (aq) , E^@ =0. 34 V`. The cell potential will be .