H2O + 1000.0 mM   Mg(OH)2
+ 0.0001 mM   NaOH
+ 400.0 mM   Na2CO3
+ atmospheric CO2   (pCO2 = 3.408)

pH = 9.97

  (at 25 °C)
Electrical conductivity:   39372.0 µS/cm   (info)
Ionic strength:   664.798 mmol/L   (info)
Alkalinity:   839.913 meq/L   (info)
Total hardness:   39.545 meq/L   (info)
Carbonate hardness:   839.913 meq/L   (info)
Redox potential (Eh):   460 mV  

NOTE:   One  mineral  precipitates.


Elements   (in mM)

C(4) DIC 4.65e+02
Mg Mg 1.98e+01
Na Na 8.00e+02
O(0) O(0) 1.31e-12

Aqueous Species   (in mM)

H+ 1.43e-07
OH- 1.49e-01
CO2 1.14e-02
HCO3- 7.96e+01
CO3-2 1.12e+02
Mg+2 2.90e+00
MgOH+ 3.92e-02
MgCO3 1.60e+01
MgHCO3+ 8.37e-01
NaOH 6.21e-03
Na+ 5.43e+02
NaHCO3 9.97e+00
NaCO3- 2.47e+02
O2 6.53e-13

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Brucite Mg(OH)2 -0.00 9.80e+02 mM  precipitates
Nahcolite NaHCO3 -1.14 under-saturated
Trona NaHCO3:Na2CO3:2H2O -3.37 under-saturated
Natron Na2CO3:10H2O -1.23 under-saturated
Thermonatrite Na2CO3:H2O -2.60 under-saturated
Magnesite MgCO3 3.32 super-saturated
MgMetal Mg -98.11 under-saturated
NaMetal Na -54.04 under-saturated

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