H2O + 1.8 mM   Na2CO3
+ 1.7 mM   NaHCO3

pH = 10.14

    (at 25 °C)
Electrical conductivity:   548.7  µS/cm   (info)
Ionic strength:   6.732  mmol/L   (info)
Alkalinity:   5.3  meq/L   (info)
Total hardness:   0.0  meq/L   (info)
Carbonate hardness:   5.3  meq/L   (info)
Redox potential (Eh):   452  mV  

Elements   (in mM)
C(4) DIC 3.50e+00
Na Na 5.30e+00
O(0) O(0) 2.38e-12
Aqueous Species   (in mM)
H+ 7.81e-08
OH- 1.51e-01
CO2 2.75e-04
HCO3- 1.85e+00
CO3-2 1.54e+00
NaOH 1.17e-04
Na+ 5.19e+00
NaHCO3 4.54e-03
NaCO3- 1.06e-01
O2 1.19e-12
Minerals   (Ksp values)
Mineral Formula SI Saturation state
Nahcolite NaHCO3 -4.54 under-saturated
Trona NaHCO3:Na2CO3:2H2O -11.90 under-saturated
Natron Na2CO3:10H2O -6.29 under-saturated
Thermonatrite Na2CO3:H2O -7.73 under-saturated
NaMetal Na -55.82 under-saturated

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