Noxx
Well-known member
When you made Gold Chloride with the Aqua Regia technique, you can either precipitate the gold in your solution with Copper, Zinc or Sodium Metabisulfide. Only use SM if you neutralised the acid with Urea. If it's not the case use copper or zinc.
Just put a little more precipitant than the amount of gold you expect.
If you expect 10g. of gold to come out, put 12g. of precipitant to be sure you won't left any gold in the solution.
Just put a little more precipitant than the amount of gold you expect.
If you expect 10g. of gold to come out, put 12g. of precipitant to be sure you won't left any gold in the solution.