H2O + 100.0 mM   (NH4)2CO3

pH = 9.23

(at 25 °C)
Electrical conductivity:   11876.2 µS/cm   (info)
Ionic strength:   129.414 mmol/L   (info)
Alkalinity:   200.0 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   200.0 meq/L   (info)
Redox potential (Eh):   -208 mV  

Elements   (in mM)

C(4) DIC 1.00e+02
Amm Ammonium 2.00e+02

Aqueous Species   (in mM)

H+ 7.21e-07
OH- 2.29e-02
CO2 8.48e-02
HCO3- 8.52e+01
CO3-2 1.47e+01
NH4+ 1.15e+02
NH3 8.53e+01

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