Question

Depict the galvanic cell in which the reaction Zn(s) + 2Ag⁺(aq) → Zn²⁺+ 2Ag(s) takes place. Further show:

1. Which of the electrodes is negatively charged?

2. The carriers of current in the cell.

3. Individual reaction at each electrode.

Answer 1

The electrochemical cell which will involve the given cell reaction is depicted as Zn(s) | Zn²⁺(aq) || Ag⁺(aq) | Ag(s).

1. In this cell, the electrode Zn(s) | Zn²⁺(aq) will act as negative terminal and Ag | Ag⁺(aq) electrode will act as positive terminal.

2. The conventional current will ow from silver to zinc electrode in the external circuit.

3. Individual reaction at each electrode :

• Cathodic reaction : 2Ag⁺(aq) + 2e → 2Ag(s)
• Anodic reaction : Zn(s) → Zn²⁺(aq) + 2e^-