Question

What is the ratio of HNO₃ and HCl in aqua regia? What are the applications of aqua regia?

Answer 1

Aqua regia:

1. In aqua regia, the HNO₃:HCl ratio is $1:3$.
2. Aqua regia is mostly used to make chloroauric acid, which is the electrolyte in the Wohlwill procedure for tweaking the purest gold.
3. Aqua regia is also used in etching and certain analytical procedures.
4. In some laboratories, it is often used to clean glassware of organic materials and metal particle