Depict the galvanic cell in which the reaction Zn(s) + 2 Ag+ (aq) → Zn2+ (aq) + 2Ag(s) takes place. Further, show
(i) Which of the electrodes is negatively charged ?
(ii) the carriers of the current in the cell.
(iii) Individual reaction at each electrode.
The set-up will be similar to that shown in Fig. 3.10. The cell will be represented as: Zn(s) | Zn2+ (aq) | | Ag+ (aq) | Ag (s)
(i) Anode, i.e., zinc electrode will be negatively charged.
(ii) the current will flow from silver to zinc in the external circuit.
(iii) At Anode : Zn(s) → Zn2+ (aq) + 2e–
At Cathode : Ag+(aq) + e– → Ag