H2O + 500.0 mM   Ca(OH)2
+ 1000.0 mM   H2S

pH = 12.06

  (at 25 °C)
Electrical conductivity:   15243.1 µS/cm   (info)
Ionic strength:   831.698 mmol/L   (info)
Alkalinity:   437.811 meq/L   (info)
Total hardness:   437.811 meq/L   (info)
Carbonate hardness:   437.811 meq/L   (info)
Redox potential (Eh):   -806 mV  

NOTE:   One  mineral  precipitates.


Elements   (in mM)

Ca Ca 2.19e+02
S S 9.93e+02
S(-2) Sulfide 9.93e+02

Aqueous Species   (in mM)

H+ 1.17e-09
OH- 1.88e+01
Ca+2 2.05e+02
CaOH+ 1.38e+01
H2S 8.15e-07
HS- 2.17e-01
S-2 9.85e-02
H2 7.90e+02

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Gypsum CaSO4:2H2O -34.83 under-saturated
Portlandite Ca(OH)2 -0.00 2.79e+02 mM  precipitates
Anhydrite CaSO4 -35.03 under-saturated
Sulfur S -16.97 under-saturated

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