it is (SO4)-2
Ferrous sulphate, or iron (II) sulphate has the formula FeSO4.
The formula for ferrous sulphate is FeSO4.
Ferric sulphate, or iron (III) sulphate has the formula Fe2(SO4)3.
The Chemical Formula for Nickel Sulphate is NiSO4.
The molecular formula for Ammonium Sulphate is (NH4)2SO4.
The chemical formula for ferrous sulfate is FeSO4.
Anhydrous sodium sulphate is Na2SO4
The formula of the sulphate ion is SO42-
the formula is CuSO4
Formula: FeSO4
Formula: MgSO4
Formula: Na2SO4