H2O + 1.887 mM   Na2CO3
+ atmospheric CO2   (pCO2 = 3.408)

pH = 8.75

  (at 25 °C)
Electrical conductivity:   346.5 µS/cm   (info)
Ionic strength:   3.874 mmol/L   (info)
Alkalinity:   3.774 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   3.774 meq/L   (info)
Redox potential (Eh):   534 mV  

(NOTE: No   preselected minerals   precipitate.)


Elements   (in mM)

C(4) DIC 3.66e+00
Na Na 3.77e+00
O(0) O(0) 1.99e-12

Aqueous Species   (in mM)

H+ 1.91e-06
OH- 5.98e-03
CO2 1.33e-02
HCO3- 3.52e+00
CO3-2 1.12e-01
NaOH 3.49e-06
Na+ 3.76e+00
NaHCO3 6.52e-03
NaCO3- 6.04e-03
O2 9.96e-13

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Nahcolite NaHCO3 -4.39 under-saturated
Trona NaHCO3:Na2CO3:2H2O -13.11 under-saturated
Natron Na2CO3:10H2O -7.66 under-saturated
Thermonatrite Na2CO3:H2O -9.10 under-saturated
NaMetal Na -57.33 under-saturated

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