Question

what is aqua region​

Answer 1

Answer:

Aqua regia is mixture of 3 parts of concentrated hydrochloric acid (HCl) and 1 part of concentrated nitric acid ${\sf{(HNO_3).}}$

It is useful for dissolving noble metals such as gold, platinum, palladium etc.

• It is a Latin name, meaning king's water or loyal water.
• Prepared in the ratio of 3 : 1.
• Reddish - orange or yellowish - orange fuming liquid.
• It needs to be mixed fresh before use.
• It is corrosive as it is a mixture of two highly corrosive strong acids.
• But it cannot dissolve diamond as it is the hardest material and the molecular bond is too strong to get break by any acid.

Answer 2

Answer:

aqua regia is a very effective solution of acids HCL (hydrochloric acid) and HNO3 (nitric acid)

in proportion of 3 :1 it is enough powerful to oxidize least reactive metals such as gold and platinum