Table 1.

Solution complexes and solid phases in equilibria calculations.

Solid Phases	Solution Complex Species
Fe(OH)2	FeCl2	OH−	[FeCl2]+
Fe(OH)3	FeCl3	Fe2+	[Fe(OH)2]+
NaCl	HCl	Fe3+	[FeCl]2+
FeCl2·4H2O	Aqueous Fe(OH)3 and Fe(OH)2 precipitation precursors	[FeCl]+	[Fe(OH)]2+
FeCl2	Cl−	[FeOH]+	[FeCl4]−
NaOH·H2O	[Fe2(OH)2]4+	[Fe(OH)4]2−	[Fe(OH)4]−
FeCl3·6H2O	H+	[Fe(OH)3]−	Na+