Question

What is kingly water?​

Answer 1

Kingly water or Royal water or Aqua regia, is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. It is a yellow-orange fuming liquid, so named by alchemists because it can dissolve noble metal like gold or platinum, but not in all metal.

Answer 2

Aqua regia ("royal water" or "king's water") 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 because it can dissolve the noble metals goldand platinum, though not all metals