How-to Pure gold. Gold Aqua regia dissolving. Chloroauric acid. gold refining recovery. Pure gold precipitate. 24k pure 99.99% refine.
Gold refine process ( Aqua regia acid. Aqua regia is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange fuming liquid, so named by alchemists