Chemical Forums
Specialty Chemistry Forums => Other Sciences Question Forum => Topic started by: marika on November 13, 2009, 11:04:43 AM
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once these metals are disolved in aqua regia, how do i get the various metals back?
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They were dissolved by oxidation, they can be precipitated by reduction.
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Ok. All I know about chemistry is what I have read about the subject. I need to have a more specific answer. thank you.
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That will require more specific question, as there are many possible ways of dealing with the problem. Adding almost any reducing agent to the solution should preciptate noble metals.
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:)ok. lets say i want to get the platinum out of the mixture. how do i do that.
and the silver. i have heard that the liquid should be dried out over low heat, then the silver forms a "crystal"? is that so?
thank you very much ???
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Are you actually doing this?
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As far as Gold....
Once you have used the aqua regia on the gold and the process is complete.
The excess nitric acid must be neutralized with urea to PH 1 +/- 0.4 then drop the gold with SMB.
* SMB - Sodium Meta Bisulfite plus water = 28.3 grams sodium meta bisulfite, 240 ml H20.
William