Concept:Silver electroplating transfers silver metal from the anode to the object being coated, using the object as the cathode.
Explanation:For silver plating to work, the spoon must be the cathode.
When current flows, silver ions
Ag+ move to the cathode and are reduced, forming a solid silver layer on the spoon.
The anode must be a pure silver rod because it continuously dissolves, releasing
Ag+ ions to replace those deposited on the spoon.
If the anode were made of a different metal, the correct silver ions would not be replenished and the plating solution would become contaminated.
The electrolyte must be a soluble silver salt, such as
AgNO3, to supply a steady stream of silver ions for deposition.
Therefore, the industrial set-up uses the spoon as the cathode, a silver rod as the anode, and a soluble silver salt as the electrolyte.
Answer:A. Cathode is the spoon; anode is a silver rod; electrolyte is a soluble silver salt.