H2O + 0.0025 mM   CaCO3
+ 0.0051 mM   H3PO4

pH = 5.96

  (at 25 °C)
Electrical conductivity:   0.7 µS/cm   (info)
Ionic strength:   0.009 mmol/L   (info)
Alkalinity:   -0.0 meq/L   (info)
Total hardness:   0.005 meq/L   (info)
Carbonate hardness:   0.0 meq/L   (info)
Redox potential (Eh):   698 mV  



Elements   (in mM)

C(4) DIC 2.50e-03
Ca Ca 2.50e-03
P P 5.10e-03
O(0) O(0) 1.80e-12

Aqueous Species   (in mM)

H+ 1.11e-03
OH- 9.11e-06
CO2 1.78e-03
HCO3- 7.20e-04
CO3-2 3.09e-08
Ca+2 2.50e-03
CaCO3 1.26e-10
CaHCO3+ 2.26e-08
CaOH+ 3.72e-10
CaH2PO4+ 3.04e-07
CaHPO4 3.62e-07
CaPO4- 7.75e-10
H3PO4 7.33e-07
H2PO4- 4.83e-03
HPO4-2 2.72e-04
PO4-3 1.12e-10
O2 8.98e-13

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Calcite CaCO3 -7.64 under-saturated
Portlandite Ca(OH)2 -16.49 under-saturated
Hydroxyapatite Ca5(PO4)3OH -20.51 under-saturated
Aragonite CaCO3 -7.79 under-saturated
Vaterite CaCO3 -8.21 under-saturated
CaCO3(a) CaCO3 -9.72 under-saturated
Ikaite CaCO3:6H2O -9.50 under-saturated
Hydroxyapatite(Natur) Ca5(PO4)3OH -16.63 under-saturated
Brushite CaHPO4:2H2O -5.57 under-saturated
Monetite CaHPO4 -5.27 under-saturated
Whitlockite Ca3(PO4)2 -13.74 under-saturated
Whitlockite(low) Ca3(PO4)2 -12.02 under-saturated
Whitlockite(high) Ca3(PO4)2 -13.75 under-saturated

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