H2O + 0.025 mM   NaOH
+ 0.0555 mM   H2O
+ 0.0062 mM   Na2SO3

pH = 9.44

  (at 25 °C)
Electrical conductivity:   8.0 µS/cm   (info)
Ionic strength:   0.042 mmol/L   (info)
Alkalinity:   0.029 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   0.029 meq/L   (info)
Redox potential (Eh):   -370 mV  



Elements   (in mM)

Na Na 3.74e-02
S S 6.19e-03
S(6) Sulfate 4.31e-03
S(4) Sulfite 4.75e-13
S(-2) Sulfide 1.88e-03

Aqueous Species   (in mM)

H+ 3.65e-07
OH- 2.79e-02
NaOH 1.82e-07
Na+ 3.74e-02
NaSO4- 7.83e-07
HSO4- 1.48e-10
SO4-2 4.31e-03
H2S 6.94e-07
HS- 2.21e-04
S-2 7.54e-08
HSO3- 2.47e-15
SO3-2 4.72e-13
H2 2.92e-07

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Thenardite Na2SO4 -13.88 under-saturated
Mirabilite Na2SO4:10H2O -13.09 under-saturated
Sulfur S -7.61 under-saturated
NaMetal Na -44.03 under-saturated

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