What happens when :
(i) `SO_(2)` gas is passed through an aqueous solution `Fe^(3+)` salt?
(ii) `XeF_(4) " reacts with " SbF_(5)`?

Explanation

(i) `So_(2)` act as reducing agent and hence, reduce an aqueous solution of `Fe^(3+)` Salt to `Fe^(2+)` Salt
`SO_(2) + 2H_(2)O to SO4^(2-) + 4H^(+)+ 2e^(-)`
`2Fe^(3+) + 2e^(-) to 2Fe^(2+)`
`2 Fe^(3+) + SO_(2) + 2H_(2)O to 2Fe^(2+) + SO4^(2-) +4H^(+)`
(ii) `XeF_(4) + Sb_(+5) to [XeF_(3)] + [SbF_(6)]^(-)`