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

Q: 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

Answer: E Explanation: In Fe₂(SO₄)₃ the three sulfate ions give total charge 3×(-2)=-6, so the two Fe atoms must supply +6 total, i.e. each Fe is +3. The correct name is iron(III) sulfate, not iron(III) sulfide.

Answer: E

Explanation: In Fe₂(SO₄)₃ the three sulfate ions give total charge $3\times(-2)=-6$ , so the two Fe atoms must supply $$+6$$ total, i.e. each Fe is $$+3$$ . The correct name is iron(III) sulfate, not iron(III) sulfide.

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