Question

We need copper sulphate to electroplate a metal with copper. How are metals electroplated with gold if gold sulphate doesn't exist?

Answer 1

the gold plating is connected to the anode (+ve charged electrode) of the circuit and the jewellery is kept at the cathode (-ve charged electrode). Both are kept immersed in a highly developed electrolytic bat (solution). At this stage, a DC current is supplied to the anode that oxidizes the gold atoms and dissolves them into the solution.

The dissolved ions of gold are reduced at the cathode and plated on the jewellery.