What happens when sulphur dioxide is passed ...

NCERT Class XII Chemistry
Chapter - The p-Block Elements
Questions with Solutions

Question : 60 of 74

Marks: +1, -0

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

Solution:

When sulphur dioxide is passed through an aqueous solution offerric ions, ferric ions are reduced to ferrous ions.

\mathrm{Fe}^{3+} + \mathrm{SO}_2 + 2\mathrm{H}_2\mathrm{O} \rightarrow 2\mathrm{Fe}^{2+} + \mathrm{SO}_4^{2-} + 4\mathrm{H}^{+}

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