I boiled the pgm's in aqua regia then filtered, then evaporated two times to not totally syrup, but close. dark red color.
I added HCL after each evaporation, but when I tried to precipitate pt nothing happened. Is it possible theres still nitrates in the solution? i didn't see much brown fumes when evaporating/boiling AR, but its only 10ml or so nitric.
Does the pt solution / ammonium chloride need to be hot to precipitate?
I left after like 30 minutes, is it possible I'll go back and see a precipitant?
I added HCL after each evaporation, but when I tried to precipitate pt nothing happened. Is it possible theres still nitrates in the solution? i didn't see much brown fumes when evaporating/boiling AR, but its only 10ml or so nitric.
Does the pt solution / ammonium chloride need to be hot to precipitate?
I left after like 30 minutes, is it possible I'll go back and see a precipitant?