H2O + 100.0 mM   Na2SO3

pH = 12.53

  (at 25 °C)
Electrical conductivity:   21052.2 µS/cm   (info)
Ionic strength:   246.796 mmol/L   (info)
Alkalinity:   62.464 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   62.464 meq/L   (info)
Redox potential (Eh):   -555 mV  



Elements   (in mM)

Na Na 2.00e+02
S S 1.00e+02
S(6) Sulfate 6.88e+01
S(4) Sulfite 7.66e-09
S(-2) Sulfide 3.12e+01

Aqueous Species   (in mM)

H+ 3.74e-10
OH- 4.90e+01
NaOH 8.16e-01
Na+ 1.85e+02
NaSO4- 1.38e+01
HSO4- 5.97e-10
SO4-2 5.50e+01
H2S 3.84e-09
HS- 2.29e-03
S-2 2.33e-03
HSO3- 1.23e-14
SO3-2 7.66e-09
H2 3.44e-07

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Thenardite Na2SO4 -3.20 under-saturated
Mirabilite Na2SO4:10H2O -2.43 under-saturated
Sulfur S -9.94 under-saturated
NaMetal Na -37.33 under-saturated

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