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  1. U

    Gold precipitating agents/methods

    Anybody with experience or thorough testing of various precipitating agents that could help me determine best gold precipitation methods or agents? I have heard SMB is very good, but I've also heard about various other such as FeSO4, Na2S, Ascorbic acid, Zinc, SO2 gas, Activated Carbon. These...
  2. 100tific

    Reaction of metals in acids

    Hi everyone, i was making some test and i want to show you my results and the reactions that I think take place. It took me a lot of time and effort to reach these conclusions and yet there are many that I have doubts about. I hope they can be of some use to you and I encourage you to correct...
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