Chemistry

Iron(III) sulfate is about using the charge-balance principle: the Roman numeral tells you the charge on the iron ion, and you need enough sulfate ions to neutralize it. Since iron is +3 and sulfate ($\text{SO}_4$) carries a −2 charge, you'll need three sulfate ions for every two iron atoms to balance the charges. Think of it as a puzzle where the subscripts fall out naturally from making the total charge zero.

Iron(III) sulfate is about using the charge-balance principle: the Roman numeral tells you the charge on the iron ion, and you need enough sulfate ions to neutralize it. Since iron is +3 and sulfate ($\text{SO}_4$) carries a −2 charge, you'll need three sulfate ions for every two iron atoms to balance the charges. Think of it as a puzzle where the subscripts fall out naturally from making the total charge zero.