Iron(3) is Fe3
Sulphate is SO subscript 4
3Fe (s) + Al2(SO4)3 (aq) → 3Fe(SO4) (aq) + 2Al (s)
The reaction between potassium dichromate (K2Cr2O7) and iron(II) sulfate (FeSO4) results in a double displacement reaction producing iron(III) chromate (Fe2(CrO4)3) and potassium sulfate (K2SO4). The balanced equation is: 3FeSO4 + K2Cr2O7 → Fe2(CrO4)3 + K2SO4.