01
Sep
Does Nitric Acid And Salt Make Gold. A solution called pickle liquor which usually contains acid is used to remove the surface impurities. It causes severe skin burn. Pickling is a metal surface treatment used to remove impurities such as stains inorganic contaminants rust or scale from ferrous metals copper precious metals and aluminum alloys. As a precursor to making Silver Powder.
The main objection to it is the cost of the acid. Nitric acid has no action on gold platinum iridium tantalum rhodium and titanium. To remove Chlorine from acid plating baths and to remove dissolved Chlorine from water. 3 hydrochloric acid and nitrates. Tap water and distilled water. In its pure form it is colourless but as it gets older it turns into a yellow cast.
Because there are only four levels of acid potency the standard acid test is not ultra-accurate.
I synthesize a small amount of weak nitric acid to dissolve the copper from some gold bearing copper I had. After that SLOWLY ad. This colour appears due to the decomposition of Nitric acid to oxides of nitrogen and water. Nitric acid is a powerful oxidizer which will actually dissolve a virtually undetectable amount of gold forming gold ions Au 3. The main objection to it is the cost of the acid. Salt NaCl and nitric acid HNO3 would make an HCl HNO3 and sodium in solution basically a form of aqua regia since the gold was very thin it dissolved in this solution and plated back out on un-dissolved base metals the only way to get it back would be to dissolve every bit of base metals the problem with whole circuit boards is there can be base metals deep down under or inside of board.