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Roman numerals shown in a chemical formula, indicate the oxidation number of theprincipal metal ion.

e.g.

Fe(II)SO4 ; Ferric Sulphate

Fe(III)SO4 ; Ferrous sulphate.

KMnO4 = KMn(VII)O4 , Potassium permanganate . The manganese is in oxidation state (VII) ' '7'.

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lenpollock

Lvl 17
5mo ago

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