H2O + 1000.0 mM   FeSO4

pH = 5.79

  (at 25 °C)
Electrical conductivity:   32691.8 µS/cm   (info)
Ionic strength:   1902.283 mmol/L   (info)
Alkalinity:   0.0 meq/L   (info)
Total hardness:   2000.001 meq/L   (info)
Carbonate hardness:   0.0 meq/L   (info)
Redox potential (Eh):   -64 mV  



Elements   (in mM)

S S 1.00e+03
S(6) Sulfate 1.00e+03
S(4) Sulfite 2.37e-10
S(-2) Sulfide 1.08e-07
Fe Fe 1.00e+03
Fe(2) Fe(II) 1.00e+03
Fe(3) Fe(III) 8.65e-07

Aqueous Species   (in mM)

H+ 2.24e-03
OH- 1.12e-05
Fe+2 4.76e+02
Fe(OH)3- 2.92e-12
FeOH+ 2.59e-02
Fe(OH)2 5.17e-08
FeSO4 5.24e+02
FeHSO4+ 8.80e-03
Fe(HS)2 4.57e-12
Fe+3 1.18e-11
FeOH+2 1.88e-08
Fe(OH)2+ 8.20e-07
Fe(OH)3 2.55e-08
Fe(OH)4- 3.44e-11
FeSO4+ 6.62e-10
FeHSO4+2 1.84e-15
Fe(SO4)2- 4.89e-10
HSO4- 1.48e-02
SO4-2 4.76e+02
H2S 8.99e-08
HS- 1.83e-08
S-2 5.26e-15
H2SO3 1.60e-14
HSO3- 1.97e-10
SO3-2 3.94e-11
H2 1.71e-10

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Fe(OH)3(a) Fe(OH)3 -2.73 under-saturated
Fe(OH)2 Fe(OH)2 -3.42 under-saturated
JarositeH H3OFe3(SO4)2(OH)6 -13.79 under-saturated
Goethite FeOOH 3.17 super-saturated
Hematite Fe2O3 8.35 super-saturated
Magnetite Fe3O4 11.09 super-saturated
Pyrite FeS2 4.81 super-saturated
FeS(ppt) FeS -2.39 under-saturated
Mackinawite FeS -1.65 under-saturated
Greigite Fe3S4 -7.28 under-saturated
Sulfur S -5.26 under-saturated
FeO FeO -3.04 under-saturated
FeMetal Fe -14.91 under-saturated

Disclaimer:   The pH calculator has been tested with great care. Nevertheless, the results are provided without warranty.