H2O + 400.0 mM   NaHCO3

pH = 7.81

(at 25 °C)
Electrical conductivity:   27824.4 µS/cm   (info)
Ionic strength:   364.429 mmol/L   (info)
Alkalinity:   399.942 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   399.942 meq/L   (info)
Redox potential (Eh):   589 mV  

Elements   (in mM)

C(4) DIC 4.00e+02
Na Na 4.00e+02
O(0) O(0) 1.64e-12

Aqueous Species   (in mM)

H+ 2.00e-05
OH- 9.69e-04
CO2 8.08e+00
HCO3- 3.50e+02
CO3-2 2.96e+00
NaOH 2.94e-05
Na+ 3.61e+02
NaHCO3 3.34e+01
NaCO3- 5.12e+00
O2 8.20e-13

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Nahcolite NaHCO3 -0.64 under-saturated
Trona NaHCO3:Na2CO3:2H2O -4.70 under-saturated
Natron Na2CO3:10H2O -3.04 under-saturated
Thermonatrite Na2CO3:H2O -4.43 under-saturated
NaMetal Na -56.39 under-saturated

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