a copper vessel is to be electroplated with silver name the anode cathode and the electrolyte used in his purpose
Answers
For the electroplating of a copper vessel, the vessel is used as the cathode, sodium argentocyanide salt is used as the electrolyte, and a strip of metal silver is used as the anode.
• Electroplating is the process of coating one material over another.
• Here, copper is to be electroplated. So, the copper vessel is made the cathode, so that the silver cations migrate towards it for deposition.
• Silver is to be coated on copper. So, sodium argentocyanide Na[Ag(CN)₂] is chosen as the electrolyte, so that it dissociates and give Ag+ ions.
• Sodium argentocyanide, being a weak electrolyte, has a slower rate of dissociation. This causes a gradual, even and smooth plating of silver on copper.
• A strip of silver (Ag) is chosen as the anode, to maintain the supply of silver ions in the electrolyte.
Answer:
(i) Cathode: Highly cleaned article such as copper cup. Anode : A plate or rod of silver