A metal article is to be electroplated with silver. The electrolyte se

1.	A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide. 1. What kind of salt is sodium argentocyanide? 2. Why is it preferred to silver nitrate as an electrolyte? 3. State one condition to ensure that the deposit is smooth, firm and long lasting. 4. Write the reaction taking place at the cathode.5. Write the reaction taking place at the anode.
Answer» 1. A complex salt. 2. When silver nitrate is used, deposition of silver on cathode is not uniform because it is a strong electrolyte. 3. A small current is passed for a longer time. 4. Ag⁺ + e^– → Ag 5. Ag – e^– → Ag⁺ .

A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide. 1. What kind of salt is sodium argentocyanide? 2. Why is it preferred to silver nitrate as an electrolyte? 3. State one condition to ensure that the deposit is smooth, firm and long lasting. 4. Write the reaction taking place at the cathode.5. Write the reaction taking place at the anode.

Answer»

1. A complex salt.

2. When silver nitrate is used, deposition of silver on cathode is not uniform because it is a strong electrolyte.

3. A small current is passed for a longer time.

4. Ag⁺ + e^– → Ag

5. Ag – e^– → Ag⁺ .