Question

Aqua regia is a mixture of:

Answer 1

Aqua regia: It is a yellow-orange or red-colored fuming liquid.

• Aqua regia is a mixture of concentrated Nitric acid $\left({\mathrm{HNO}}_3\right)$ and concentrated Hydrochloric acid $\left(\mathrm{HCl}\right)$ in the ratio of 1:3.

Uses of Aqua regia:

• It can dissolve noble metals such as Gold $\left(\mathrm{Au}\right)$ and Platinum $\left(\mathrm{Pt}\right)$
• Aqua regia is mainly used for the manufacture of Chloroauric acid $\left({\mathrm{HAuCl}}_4\right)$
• It is used as an electrolyte in the Wohlwill process to refine gold to the purity of 99.999%.