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Vlad
07-22-2009, 01:56 PM
Check it out.

Vlad
07-22-2009, 03:50 PM
I titrated slowly with KOH, and noticed somewhere while still in acid pH, that the solution gave quite a significant amount of white precipitate and I felt the energy effect of m-gold at the forehead.

Every time I added a drop, I saw a golden yellow cloud.
(This was likely bromine.)

I continued titrating expecting more precipitate to drop, but instead the solution turned piss to golden yellow, and the precipitate redissolved.

The pH was still acid, about pH 5.

Continued raising of the pH until ph 14, and addition of H2O2 at a sample both at neutral and high pH, did drop nothing.

Reacidifying with HCl gave a sort of clear to yellow solution. No precipitate dropped when sodium bicarbonate was added, though at a point energy feelings were back at the forehead. If titration was done slowly and carefully the precipitate would likely have been visible again and dropped.

I think the gold stayed in solution as goldbromide.
It's apparently not easy to get m-state out of the bromide form.
It drops somewhere in low acid pH.