a) In the electroplating cell, energy was converted from electrical to chemical. Cells that convert electric energy to chemical energy are called electrolytic cells.
b) (1): anode (2): cathode (metal to be coated) (3): DC power supply or battery (4): solution containing Ag+ (the ion of the coating metal) (5) electrolytic cell (6): connecting wires
c) the anode is connected to the positive pole of the battery while the cathode is connected to the negative pole of the battery since the anode is the (+) pole (loses electrons) while the cathode is the negative pole (gains electrons) of the cell.
d) AgNO3 is the suitable solution since it contains Ag+ ion which is the ion of Ag metal, the other solution are not suitable because they do not contain the ion of the coating metal.
e) We electroplate objects to:
- protect them from corrosion since the coating metal would be more corrosion-resistant
- protect them from corrosion since the coating metal would be more corrosion-resistant
- give objects a more attractive appearance
f) oxidation half reaction: Ag→ Ag+ + 1e
reduction half reaction Ag+ + 1e → Ag
The overall reaction would be: Ag + Ag+→ Ag+ + Ag
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