Question

The IUPAC name of the complex ion formed when gold dissolves in aqua regia are ______

Options

• tetrachloridoaurate (III)

• tetrachloridoaurate (I)

• tetrachloridoaurate (II)

• dichloridoaurate (III)

Answer 1

The IUPAC name of the complex ion formed when gold dissolves in aqua regia are tetrachloridoaurate (III).

Explanation:

Aqua regia dissolves gold,

\[\ce{\underset{Gold}{Au} + 4H+ + \underset{Nitrate ion}{NO3-} + \underset{Chloride ion}{4Cl-} -> \underset{Tetrachloridoaurate (III)}{AuCl4-} + \underset{Nitric oxide}{NO} + \underset{water}{2H2O}}\]