Question

what is royal water mixture

Answer 1

Royal water is called aquaria

it is prepared by hydrochloric acid and nitric acid in 1 is to 3 ratio.

it is very powerful it can also dissolve gold

Answer 2

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 gold and platinum, though not all metals.