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Write the balanced equations for the rea...

Write the balanced equations for the reaction occuring when gold is dissolved in aqua regia.

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Aqua regia is three parts conc. `HCl` and one part conc. `HNO_(3)`. Aqua regia forms nascent chlorine, which attacks gold.
`HNO_(3) + 3HCl rarr NOCl + 2H_(2)O + 2Cl`
`Au + 3Cl rarr AuCl_(3)`
`AuCl_(3) + HCl rarr H AuCl_(4)`.
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