Depict the galvanic cell in which the reaction
`Zn_((s))+2Ag_((aq))^(+)toZn_((aq))^(2+)+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.

Explanation

Redox reaction : `Zn_((s))+2Ag_((aq))^(+)toZn_((aq))^(+2)+2Ag_((s))`
Here Zn reduced to `Zn^(+2)andAg^(+)` oxidised to Ag. Therefore on Zn there is reduction.
`Zn|Zn_((aq))^(+2)||Ag_((aq))^(+)|Ag`
(i) On Zn electrode their is oxidation, therefore on Zn rod the electrons are gathered. Therefore Zn rod is positively charged.
(ii) Electron flows Zn to Ag electrode and electricity flows Ag to Zn electrode.
(iii) Reaction on electrodes :
`Zn_((s))toZn_((aq))^(+2)+2e^(-)Ag_((aq))^(+)+2e^(-)toAg_((s))`