How gold is dissolved in aqua regia? | AnswersDrive
aqua regia Bottles of aqua regia. Thejohnnler Aqua regia and other mixtures similar to it are used in analytical procedures for the solution of certain iron ores, phosphate rocks, slags, nickel-chromium alloys, antimony, selenium, and some of the less soluble sulfides, .Hobbyist gold refiners use sodium nitrate to make a hybrid aqua regia that dissolves gold and other metals.  Less common applications include as an oxidizer in fireworks, replacing potassium nitrate commonly found in black powder, and as a component in instant cold packs.