8.30 Depict the galvanic cell in which the reaction 

Zn(s)+2Ag^{+}\rightarrow Zn^{2+}(aq)+2Ag(s)
takes place, Further show:

(i) which of the electrode is negatively charged,

(ii) the carriers of the current in the cell, and

(iii) individual reaction at each electrode.

Answers (1)


(i) Zn electrode is negatively charged because it loses electrons (act as an anode)

(ii) electron flow from negatively charged electrode to a positively charged electrode (anode to cathode) and the flow of current is just reversed. So current flow through silver cathode to the zinc anode.

(iii) At Anode-  Zn\rightarrow Zn^{2+}+2e^{-}

   At Cathode Ag^{+}+e^{-}\rightarrow Ag