hodhod1403
Member
I put a copper foil in the acid solution that contains gold(|) . After 24 hours, the solution turned black and the copper is dissolving and black particles have settled under it. Question? Why do you think the solution turned black and how long does it take to dilute it?Nothing here looks like Gold.
If there is any Precious Metals in there you can put in a piece of Copper and they will cement out.
Just make sure it is acidic