Chemistry
During silver plating of an article using potassium argento-cyanide as an electrolyte, the anode material should be :
Cu
Ag
Pt
Fe
Answer
Ag
Reason — During silver plating using potassium argento-cyanide as an electrolyte, the anode should be block of pure clean silver.
The anode dissolves, supplying Ag⁺ ions to the electrolyte. These Ag⁺ ions then get reduced at the cathode (the article to be plated) and deposited as metallic silver.
Related Questions
Identify the weak electrolyte from the following:
- Sodium Chloride solution
- Dilute Hydrochloric acid
- Dilute Sulphuric acid
- Aq. acetic acid.
An aqueous electrolyte consists of the following ions. The ion which could be discharged most readily during electrolysis is :
Fe2+
Cu2+
H+
Al3+
State which of these will act as a non-electrolyte:
- Liquid carbon tetrachloride
- Acetic acid
- Sodium hydroxide aqueous solution.
- Potassium chloride aqueous solution.
The observation seen when fused lead bromide is electrolysed is:
- a silver grey deposit at anode and a reddish brown deposit at cathode.
- a silver grey deposit at cathode and a reddish brown deposit at anode.
- a silver grey deposit at cathode and reddish brown fumes at anode.
- silver grey fumes at anode and reddish brown fumes at cathode.