1.

What is Royal water?

Answer»

Solution :When THREE parts of concentratedhydrochloric acid and one part of concentrated nitric acid nd mixed, aquaregia is obtained. This is ALSO known as Royal water. This is used for dissolving gold, platinum ETC.
`Au+4H^(+)+NO_(3)^(-)+4Cl^(-)rarr AuCl_(3)^(-)rarr AuCl_(4)^(-)+NO+2H_(2)O`
`3Pt+16H^(+)+4NO_(3)^(-)+18Cl^(-)rarr 3PtCl_(3)^(2-)+NO+8H_(2)O`


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