Question

What happens when sulphur dioxide is passed through an aqueous solution of Fe(III) salt?

Answer 1

`SO_(2(g))` acts as reducing agent and reduces `Fe(III)toFe(III)` salt.
`SO_2+2H_2OtoSO_4^(2-)+4H^(o+)+2e^(ɵ)`
`underline[(Fe^(3+)+e^(ɵ)toFe^(2+)]xx2)`
`underline(SO_2+2H_2O+2Fe^(2+)toSO_4^(2+)+4H^(o+)+2Fe^(2+))`