Posted by Chuck(G) on April 25, 2002 at 21:36:49:
In Reply to: Re: Re: How much gold for plating? posted by Graham W. on April 25, 2002 at 21:08:04:
Whoops, "aqua regia" as we old fogies know it is 1 part fuming HNO3 mixed with 3 parts HCl, not H2SO4.
Gold- and silver-plating is usually done with metallic cyanide salts in a basic solution. I respectfully suggest that if you're going to be fooling with making your own AuCN that you have access to a good fume hood and take appropriate precautions.
Heck, why not go all the way and start off by making your own hydrogen cyanide? Just the reaction between methane and ammonia at elevated temps in the presence of a platinum catalyst. Or you could find an electric arc furnace and synthesize it via the cyanamide process...
Me, I'd rather buy the salts.
"Verbosity leads to unclear, inarticulate things." Governor George W. Bush, Jr., 11/30/96