Aqua regia is a corrosive mixture of nitric and hydrochloric acid, used to dissolve gold, platinum, and palladium. Learn the reaction, safety, and disposal of this acid solution, and how to prepare it in small amounts. How is aqua regia produced? What are its characteristics and where it is used? For more information, see the article, ‘What is aqua regia and what is it used for?’ on the PCC Group's blog. Aqua regia is a mixture of nitric acid and hydrochloric acid that can dissolve gold and other noble metals. Learn how it works, how to make it, and how a Hungarian chemist saved Nobel Prize gold medals from Nazis with it. Aqua regia is a fascinating yet dangerous liquid. Aqua Regia is a Latin word meaning “royal water” and is a mixture of two acids. The chemical consists of two acids, nitric acid (HNO 3) and hydrochloric acid (HCl), mixed in a 3:1 ratio with three parts of HCl and one part of HNO 3. Here, we will discuss the concept, how it dissolves gold, precautions and other facts along with important questions. Aqua regia is known as royal water because it has the ability to dissolve various metals ...