I have an alkaline solution containing gold (AuCl) and over time I notice a pink precipitate forming, any ideas what this would be?
Also one other question-
I know soft base anion ligands like APDC (a sulfur ligand) complex well with soft acid cation metals like cadmium and mercury, I was just wondering how well APDC would complex with other metals like chromium, cobalt, and arsenic? APDC = Ammonium pyrrolidinecarbodithioate.
Is there a place I could check the stability constants for these? I want to keep all metals in solution, no precipitates. I've heard that APDC can co-precipitate certain metals at certain pHs, has any one heard of this or know any more?
Thanks for the *delete me*