Fe2O3→Fe2(SO4)→Fe(OH)3

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This is a series of chemical reactions that start with iron(III) oxide (Fe2O3) and ultimately produce iron(III) hydroxide (Fe(OH)3) via the formation of iron(II) sulfate (Fe2(SO4)).

The overall reaction is:

Fe2O3 → Fe2(SO4) → Fe(OH)3

Iron(III) oxide reacts with sulfuric acid (H2SO4) to produce iron(II) sulfate and water:
Fe2O3 + 3H2SO4 → Fe2(SO4) + 3H2O

Iron(II) sulfate can then be further reacted with a base like sodium hydroxide (NaOH) to form iron(II) hydroxide:
Fe2(SO4) + 2NaOH → 2Fe(OH)2 + Na2SO4

Finally, iron(II) hydroxide can be oxidized to form iron(III) hydroxide:
4Fe(OH)2 + O2 → 4Fe(OH)3

Therefore, the net result of these reactions is the conversion of iron(III) oxide to iron(III) hydroxide through the formation of iron(II) sulfate and iron(II) hydroxide as intermediate species.