So4 2-
This compound does not exist.
aluminium suphate
The Chemical Formula for Nickel Sulphate is NiSO4.
Calcium Sulphate Dihydrate CaSO4, 2 H2O
The chemical formula of ferrous sulphate is FeSO4.
Sulphate SO4 2-
potassium aluminium sulphate
iron(II) sulphate
Sulphuric acid, because "sulphuric" is what gives copper sulphate it's name
nelathotha is hydrated Copper(II)Sulphate.Its formula is CuSO4.5H2O
Not sure about blue viriol but blue vitriol is copper sulphate.
Anhydrous sodium sulphate is Na2SO4