Chemicals NaNO, s) FeSO4/H*(aq) 1 M Naoh(aq) d Irot KMnO /Ht(aq) Br,aql Deionised water mine wateChemicals • NaNO2 (s) • FeSO4 /H+ (aq) • 1 M NaOH(aq) • KMnO4 /H+ (aq) • Br2 (aq) • Deionised water