Question

In the silver plating of copper, K[Ag(CN)2] is used instead of AgNO3. The reason is

Answer 1

In the silver plating of copper, K[Ag(CN)2] is used instead of AgNO3. The reason is

Answer:

The reason is less availability of Ag+ ions, as Cu can not displace Ag from [Ag(CN)2]- ion.

Answer 2

In the silver plating of copper, K[Ag(CN)₂] is used instead of AgNO₃. The reason is less availability of Ag⁺ ions, as Cu cannot displace Ag from [Ag(CN)₂]⁻ ion.

To get a shining deposit, [Ag (CN)2]– are applied as it is a steady complex, the conc. of Ag+ is very minor in the solution. As such no displacement of Ag+ ions with Cu is conceivable.