H2O + 15.5 mM   Na2HPO4
+ 4.5 mM   NaH2PO4

pH = 7.47

    (at 25 °C)
Electrical conductivity:   2665.2  µS/cm   (info)
Ionic strength:   50.089  mmol/L   (info)
Alkalinity:   15.5  meq/L   (info)
Total hardness:   0.0  meq/L   (info)
Carbonate hardness:   15.5  meq/L   (info)
Redox potential (Eh):   -97  mV  

Elements   (in mM)
Na Na 3.55e+01
P P 2.00e+01
Aqueous Species   (in mM)
H+ 3.96e-05
OH- 3.64e-04
NaOH 1.52e-06
Na+ 3.50e+01
NaHPO4- 4.56e-01
H3PO4 1.73e-05
H2PO4- 4.50e+00
HPO4-2 1.50e+01
PO4-3 5.51e-04
H2 1.58e-12
Minerals   (Ksp values)
Mineral Formula SI Saturation state
Na3PO4(cr) Na3PO4 -15.63 under-saturated
NaMetal Na -45.74 under-saturated

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