H2O + 10.0 mM   H2CO3
+ 15.0 mM   Na2CO3
+ 18.0 mM   NaCl
+ atmospheric CO2   (pCO2 = 3.408)

pH = 9.41

  (at 25 °C)
Electrical conductivity:   4475.4 µS/cm   (info)
Ionic strength:   50.048 mmol/L   (info)
Alkalinity:   30.0 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   30.0 meq/L   (info)
Redox potential (Eh):   528 mV  

(NOTE: No   preselected minerals   precipitate.)


Elements   (in mM)

C(4) DIC 2.44e+01
Na Na 4.80e+01
Cl Cl 1.80e+01
O(0) O(0) 3.82e-10

Aqueous Species   (in mM)

H+ 4.51e-07
OH- 3.20e-02
CO2 1.32e-02
HCO3- 1.85e+01
CO3-2 3.97e+00
NaOH 1.75e-04
Na+ 4.61e+01
NaHCO3 3.24e-01
NaCO3- 1.59e+00
Cl- 1.80e+01
O2 1.91e-10

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Halite NaCl -4.84 under-saturated
Nahcolite NaHCO3 -2.69 under-saturated
Trona NaHCO3:Na2CO3:2H2O -8.01 under-saturated
Natron Na2CO3:10H2O -4.27 under-saturated
Thermonatrite Na2CO3:H2O -5.70 under-saturated
NaMetal Na -56.20 under-saturated

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