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  4. Ferric sulphate is represented by which formula?

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Q. Ferric sulphate is represented by which formula?

AFMCAFMC 2003

Solution:

Ferric sulphate is $Fe _{2}\left( SO _{4}\right)_{3}$, iron exists in two oxidation states $+2$ (ferrous and $+3$ (ferric)
$FeSO _{4}=$ ferrous sulphate
$FeSO _{3}=$ Ferrous sulphite