H2O + 0.1 mM   NaOH
+ 0.2 mM   HCl
+ atmospheric CO2   (pCO2 = 3.408)

pH = 4.01

  (at 25 °C)
Electrical conductivity:   54.7 µS/cm   (info)
Ionic strength:   0.2 mmol/L   (info)
Alkalinity:   -0.1 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   0.0 meq/L   (info)
Redox potential (Eh):   818 mV  



Elements   (in mM)

C(4) DIC 1.34e-02
Na Na 1.00e-01
Cl Cl 2.00e-01
O(0) O(0) 3.68e-12

Aqueous Species   (in mM)

H+ 1.00e-01
OH- 1.03e-07
CO2 1.33e-02
HCO3- 6.11e-05
CO3-2 3.05e-11
NaOH 1.78e-12
Na+ 1.00e-01
NaHCO3 3.32e-09
NaCO3- 5.33e-14
Cl- 2.00e-01
O2 1.84e-12

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Halite NaCl -9.30 under-saturated
Nahcolite NaHCO3 -10.68 under-saturated
Trona NaHCO3:Na2CO3:2H2O -31.99 under-saturated
Natron Na2CO3:10H2O -20.25 under-saturated
Thermonatrite Na2CO3:H2O -21.68 under-saturated
NaMetal Na -63.69 under-saturated

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