The standard electrode potential corresponding to the reaction Au^(3+)(aq)+3e^(-)rarrAu(s) is 1.50 V predict if gold can be dissolved in 1M HCI solutoin and on passing hydrogen gas through god salt solution metallic gold will be precipitated or not

The standard electrode potential corresponding to the reaction Au^(3+)

1.	The standard electrode potential corresponding to the reaction Au^(3+)(aq)+3e^(-)rarrAu(s) is 1.50 V predict if gold can be dissolved in 1M HCI solutoin and on passing hydrogen gas through god salt solution metallic gold will be precipitated or not
Answer» Solution :Consider the half reaction `2H^(+)(aq)+32e^(-)rarrH_(2)(g),E^(@)=0.0 V` `AU^(3+)(aq)+3e^(-)rarrAu(s),E^(@)=1.50 V` since `E^(@)` for `Au^(3+)//Au` is higher than that `H^(+)//1/2 H_(2)(0.0 v)` therefore `Au^(3+)` can be more EASILY reduced than `H^(+)` ion this implies that `Au^(3+)` IONS can be reduced to metallic gold by `H_(2)` gas but `H^(+)` ions cannot oxidise metallic gold to `Au^(3+)` ionsin other words metallic gold does not dissolve in 1 M HCI INSTEAD `H_(2)` gas can reduce gold salt to metallic gold