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Question:

Depict the galvanic cell in which the reaction Zn(s) + 2Ag+(aq) → Zn2+(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.

Answer:

The galvanic cell corresponding to the given redox reaction is:

(i) Zn electrode is negatively charged because at this electrode, Zn oxidizes to Zn2+ and the leaving electrons accumulate on this electrode.

(ii) Ions are the carriers of current in the cell.

(iii) The reaction taking place at Zn electrode can be represented as:

Zn(s)  →  Zn2+(aq)  +  2e-

And the reaction taking place at Ag electrode can be represented as:

Ag+(aq)  +  e-  →  Ag(s)


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