Question

Aqua regia releases nascent ______.

Answer 1

Aqua regia:

• Aqua regia is a combination of strong acids that has the ability to dissolve some noble metals.
• Aqua regia is a mixture of Hydrochloric acid $\left(\mathrm{HCl}\right)$and concentrated nitric acid$\left({\mathrm{HNO}}_3\right)$ which is present in $3:1$ ratio.
• When two very strong acids are combined, they react together to form a very acidic solution.
• Aqua regia releases nascent chlorine which makes it highly reactive and this can be done by the oxidation of $\mathrm{HCl}$ by nitric acid.
• The chemical reaction can be depicted as:

${\mathrm{HNO}}_3\left(\mathrm{aq}\right)+3\mathrm{HCl}\left(\mathrm{aq}\right)⟶\mathrm{NOCl}\left(\mathrm{aq}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+2{\mathrm{Cl}}^{\bullet }$