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Write balanced chemical equations for th...

Write balanced chemical equations for the following :
"Gold is dissolved in aqua regia".

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Gold dissolves in aqua regia due to the reaction with nascent chlorine.
`[HNO_3+3HCltoNOCl+2H_2O+2Cl]xx3`
`[Au+3CltoAuCl_3]xx2`
`underline([AuCl_3+HCltoHAuCl_4]xx2)`
`underline(2Au+3KNO_3+11HCl to2HAuCl_4+3NOCl+6H_2O)`
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