Fe-->Fe(OH)3-->FeCl3-->Fe(SO4)3-->Fe2S3

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Iron undergoes a series of chemical reactions with different compounds to form Fe(OH)3, FeCl3, Fe(SO4)3, and Fe2S3.

Fe reacted with water (H2O) to form iron(III) hydroxide, Fe(OH)3.
2 Fe + 3 H2O → Fe(OH)3

Iron(III) hydroxide further reacted with hydrochloric acid (HCl) to form iron(III) chloride, FeCl3.
Fe(OH)3 + 3 HCl → FeCl3 + 3 H2O

Iron(III) chloride reacted with sulfuric acid (H2SO4) to form iron(III) sulfate, Fe(SO4)3.
FeCl3 + 3 H2SO4 → Fe(SO4)3 + 3 HCl

Iron(III) sulfate reacted with hydrogen sulfide gas (H2S) to form iron(III) sulfide, Fe2S3.
Fe(SO4)3 + 3 H2S → Fe2S3 + 3 H2SO4

Therefore, the chemical reactions of iron resulting in Fe(OH)3, FeCl3, Fe(SO4)3, and Fe2S3 involve a series of reactions with different compounds.