ऐक्वा रेगिया (Aqua Regia) का मिश्रण होता है

Aqua Regia (Latin for 'royal water') is a highly corrosive, fuming yellow or reddish liquid, renowned for its unique ability to dissolve noble metals like gold and platinum, which are otherwise resistant to individual acids.

Aqua Regia is a fresh mixture of two highly concentrated acids: nitric acid (HNO₃) and hydrochloric acid (HCl).

The typical molar ratio for Aqua Regia is 1 part concentrated nitric acid to 3 parts concentrated hydrochloric acid (1 HNO₃ : 3 HCl).

Individually, neither nitric acid nor hydrochloric acid can dissolve gold. However, in Aqua Regia, nitric acid acts as a powerful oxidizing agent, forming gold ions. Simultaneously, hydrochloric acid provides chloride ions which react with the gold ions to form tetrachloroaurate(III) anions, stabilizing the gold in solution and allowing more gold to be oxidized.

Aqua Regia is primarily used in gold refining, etching, and in specific laboratory applications where the dissolution of noble metals is required. It's also utilized in the purification of platinum group metals and in certain analytical procedures.

No, Aqua Regia is extremely dangerous due to its highly corrosive and oxidizing properties. It can cause severe burns upon contact with skin and tissues, and its fumes are toxic. It must only be handled by trained professionals in a well-ventilated fume hood with appropriate personal protective equipment (PPE).