Which formula/name pair is incorrect? a) feso4 iron(ii) sulfate b) fe2 (so3)3 iron(iii) sulfite c) fes iron(ii) sulfide d) feso3 iron(ii) sulfite e) fe2 (so4)3 iron(iii) sulfide

Option E is not correct. Fe2(SO4)3 is iron(III)sulfate not iron(III) sulfide

Explanation:

A) FeSO4 iron(II) sulfate

  ⇒ Fe has an oxidation number of +2 or SO4^2- has oxidation number 2-

 ⇒ FeSO4

B) Fe2 (SO3)3 iron(III) sulfite

⇒SO3^ has an oxidation number of -2

⇒ Fe^3+ has an oxidation number of +3

⇒ Fe2(SO3)3

C) FeS iron(II) sulfide

  ⇒ Fe has an oxidation number of +2

  ⇒ Sulfur has an oxidation number of -2

 ⇒ FeS

D) FeSO3 iron(II) sulfite

 ⇒ Fe has an oxidation number of +2

 ⇒ Sulfite = SO3^2- and has an oxidation numberof -2

 ⇒ FeSO3

Fe2 (SO4)3 iron(III) sulfide

⇒ SO4^2- has an oxidation number of 2-

⇒ Fe^3+ has an oxidation number of 3+

⇒ Fe2(SO4)3 is iron(III)sulfate not iron(III) sulfide

Option E is not correct. Fe2(SO4)3 is iron(III)sulfate not iron(III) sulfide

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explanation:

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