Gold when treated with aqua regia, gets dissolved by forming\

Question

Professor PC Thomas Classes · Answer

$\begin{aligned} & \mathrm{HNO}_3+3 \mathrm{HCl} ightarrow \mathrm{NOCl}+2[\mathrm{Cl}]+2 \mathrm{H}_2 \mathrm{O} \ & \mathrm{Au}+3[\mathrm{Cl}] ightarrow \mathrm{AuCl}_3 \ & \mathrm{AuCl}_3+\mathrm{HCl} ightarrow \underset{	ext { Chloro auric acid }}{\mathrm{H}\left[\mathrm{AuCl}_4ight]} 	ext { or } \mathrm{H}^{+}\left[\mathrm{AuCl}_4ight]^{-}\end{aligned}$