H2O + 100.0 mM   K3PO4
+ atmospheric  CO2   (pCO2 = 3.408)

pH = 9.7

    (at 25 °C)
Electrical conductivity:   24850.4  µS/cm   (info)
Ionic strength:   412.744  mmol/L   (info)
Alkalinity:   200.253  meq/L   (info)
Total hardness:   0.0  meq/L   (info)
Carbonate hardness:   200.253  meq/L   (info)
Redox potential (Eh):   -240  mV  

Elements   (in mM)
C(4) DIC 7.02e+01
K K 3.00e+02
P P 1.00e+02
Aqueous Species   (in mM)
H+ 2.59e-07
OH- 7.68e-02
CO2 1.21e-02
HCO3- 4.19e+01
CO3-2 2.84e+01
KOH 3.30e-03
K+ 2.91e+02
KHPO4- 9.56e+00
H3PO4 1.61e-09
H2PO4- 8.41e-02
HPO4-2 8.89e+01
PO4-3 1.54e+00
H2 3.25e-12
Minerals   (Ksp values)
Mineral Formula SI Saturation state
K2CO3:1.5H2O K2CO3:1.5H2O -6.65 under-saturated
KMetal K -46.12 under-saturated

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