H2O + 151.731 mM   Na2HPO4
+ 315.0 mM   NaH2PO4
+ atmospheric  CO2   (pCO2 = 3.408)

pH = 6.2

    (at 25 °C)
Electrical conductivity:   28161.1  µS/cm   (info)
Ionic strength:   719.992  mmol/L   (info)
Alkalinity:   151.731  meq/L   (info)
Total hardness:   0.0  meq/L   (info)
Carbonate hardness:   151.731  meq/L   (info)
Redox potential (Eh):   -25  mV  

Elements   (in mM)
C(4) DIC 2.68e-02
Na Na 6.18e+02
P P 4.67e+02
Aqueous Species   (in mM)
H+ 8.42e-04
OH- 2.57e-05
CO2 1.13e-02
HCO3- 1.36e-02
CO3-2 3.33e-06
NaOH 1.16e-06
Na+ 5.93e+02
NaHCO3 1.83e-03
NaCO3- 7.88e-06
NaHPO4- 2.51e+01
H3PO4 1.87e-02
H2PO4- 3.15e+02
HPO4-2 1.27e+02
PO4-3 9.43e-04
H2 1.64e-12
Minerals   (Ksp values)
Mineral Formula SI Saturation state
Nahcolite NaHCO3 -4.87 under-saturated
Trona NaHCO3:Na2CO3:2H2O -14.56 under-saturated
Natron Na2CO3:10H2O -8.69 under-saturated
Thermonatrite Na2CO3:H2O -10.06 under-saturated
Na3PO4(cr) Na3PO4 -12.93 under-saturated
NaMetal Na -45.81 under-saturated

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