H2O + 100.0 mM   HCl
+ 100.0 mM   Na2HPO4
+ atmospheric CO2   (pCO2 = 3.408)

pH = 4.4

  (at 25 °C)
Electrical conductivity:   14617.3 µS/cm   (info)
Ionic strength:   200.418 mmol/L   (info)
Alkalinity:   0.0 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   0.0 meq/L   (info)
Redox potential (Eh):   71 mV  



Elements   (in mM)

C(4) DIC 1.29e-02
Na Na 2.00e+02
Cl Cl 1.00e+02
P P 1.00e+02

Aqueous Species   (in mM)

H+ 5.03e-02
OH- 3.51e-07
CO2 1.27e-02
HCO3- 1.96e-04
CO3-2 5.53e-10
NaOH 6.55e-09
Na+ 2.00e+02
NaHCO3 1.17e-05
NaCO3- 6.35e-10
NaHPO4- 4.34e-02
Cl- 1.00e+02
H3PO4 4.05e-01
H2PO4- 9.91e+01
HPO4-2 4.11e-01
PO4-3 2.40e-08
H2 4.49e-12

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Halite NaCl -3.56 under-saturated
Nahcolite NaHCO3 -7.11 under-saturated
Trona NaHCO3:Na2CO3:2H2O -21.30 under-saturated
Natron Na2CO3:10H2O -13.14 under-saturated
Thermonatrite Na2CO3:H2O -14.55 under-saturated
Na3PO4(cr) Na3PO4 -18.35 under-saturated
NaMetal Na -47.87 under-saturated

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