When gold and platinum reacts with aqua regia then the species formed respectively are

Question

When gold and platinum reacts with aqua regia then the species formed respectively are (A) AuCl 32- and PtCl 42- (B) AuCl 4-and PtCl 62- (C) AuCl 4-and PtCl 42- (D) AuCl 63- and PtCl 62-

Tardigrade Admin · Accepted Answer

Au +4 H ++ NO 3-+4 Cl - longrightarrow AuCl 4-+ NO +2 H 2 O 3 Pt +16 H ++4 NO 3-+18 Cl - longrightarrow 3 PtCl 62-+4 NO +8 H 2 O

Q. When gold and platinum reacts with aqua regia then the species formed respectively are

$A u C l_{3}^{2 -}$ and $PtC l_{4}^{2 -}$

$A u C l_{4}^{-}$ and $PtC l_{6}^{2 -}$

$A u C l_{4}^{-}$ and $PtC l_{4}^{2 -}$

$A u C l_{6}^{3 -}$ and $PtC l_{6}^{2 -}$

$A u + 4 H^{+} + N O_{3}^{-} + 4 C l^{-} ⟶ A u C l_{4}^{-} + NO + 2 H_{2} O$
$3 Pt + 16 H^{+} + 4 N O_{3}^{-} + 18 C l^{-} ⟶ 3 PtC l_{6}^{2 -} + 4 NO + 8 H_{2} O$

Q. When gold and platinum reacts with aqua regia then the species formed respectively are

AuCl32−​ and PtCl42−​

AuCl4−​and PtCl62−​

AuCl4−​and PtCl42−​

AuCl63−​ and PtCl62−​

Au+4H++NO3−​+4Cl−⟶AuCl4−​+NO+2H2​O 3Pt+16H++4NO3−​+18Cl−⟶3PtCl62−​+4NO+8H2​O

$A u C l_{3}^{2 -}$ and $PtC l_{4}^{2 -}$

$A u C l_{4}^{-}$ and $PtC l_{6}^{2 -}$

$A u C l_{4}^{-}$ and $PtC l_{4}^{2 -}$

$A u C l_{6}^{3 -}$ and $PtC l_{6}^{2 -}$

$A u + 4 H^{+} + N O_{3}^{-} + 4 C l^{-} ⟶ A u C l_{4}^{-} + NO + 2 H_{2} O$
$3 Pt + 16 H^{+} + 4 N O_{3}^{-} + 18 C l^{-} ⟶ 3 PtC l_{6}^{2 -} + 4 NO + 8 H_{2} O$