H2O + 8.0 mM   Na2CO3
+ 1.0 mM   NaHCO3
+ 9.0 mM   H3PO4

pH = 6.54

  (at 25 °C)
Electrical conductivity:   1194.4 µS/cm   (info)
Ionic strength:   19.105 mmol/L   (info)
Alkalinity:   8.0 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   8.0 meq/L   (info)
Redox potential (Eh):   661 mV  



Elements   (in mM)

C(4) DIC 9.00e+00
Na Na 1.70e+01
P P 9.00e+00
O(0) O(0) 1.27e-12

Aqueous Species   (in mM)

H+ 3.22e-04
OH- 4.01e-05
CO2 3.23e+00
HCO3- 5.73e+00
CO3-2 1.38e-03
NaOH 9.17e-08
Na+ 1.69e+01
NaHCO3 4.16e-02
NaCO3- 2.58e-04
NaHPO4- 4.16e-02
H3PO4 2.34e-04
H2PO4- 6.77e+00
HPO4-2 2.19e+00
PO4-3 6.80e-06
O2 6.33e-13

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Nahcolite NaHCO3 -3.58 under-saturated
Trona NaHCO3:Na2CO3:2H2O -13.08 under-saturated
Natron Na2CO3:10H2O -8.44 under-saturated
Thermonatrite Na2CO3:H2O -9.87 under-saturated
Na3PO4(cr) Na3PO4 -18.15 under-saturated
NaMetal Na -58.86 under-saturated

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