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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.

Text Solution

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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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Knowledge Check

  • Gold dissolves in aqua regia forming

    A
    `Au(NO_3)_2`
    B
    `H[AuCl_4]`
    C
    `AuCl`
    D
    `AuNO_3`

  • Platinum dissolves in aqua regia to form

    A
    `PtCl_(4)`
    B
    `H_(2)PtCl_(6)`
    C
    `Pt(NO_(3))_(4)`
    D
    `[PtCl_(2)(NO_(3))_(2)]`

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