H2O + 1.0 mM   (NH4)2Cr2O7

pH = 4.61

  (at 25 °C)
Electrical conductivity:   156.9 µS/cm   (info)
Ionic strength:   2.168 mmol/L   (info)
Alkalinity:   0.0 meq/L   (info)
Total hardness:   0.0 meq/L   (info)
Carbonate hardness:   0.0 meq/L   (info)
Redox potential (Eh):   877 mV  



Elements   (in mM)

Amm Ammonium 2.00e+00
Cr Cr 2.00e+00
Cr(3) Cr(3) 6.25e-06
Cr(6) Cr(6) 2.00e+00
O(0) O(0) 9.38e-06

Aqueous Species   (in mM)

H+ 2.57e-02
OH- 4.30e-07
NH4+ 2.00e+00
NH3 4.42e-05
CrO4-2 2.57e-02
HCrO4- 1.74e+00
H2CrO4 5.62e-06
Cr+3 1.41e-06
Cr(OH)+2 4.46e-06
Cr(OH)2+ 3.74e-07
Cr(OH)3 1.07e-09
Cr(OH)4- 4.41e-16
Cr2O7-2 1.16e-01
CrO2- 1.12e-15
O2 4.69e-06

Minerals   (Ksp values)

Mineral Formula SI Saturation state
Cr(OH)2 Cr(OH)2 -32.15 under-saturated
Cr(OH)3(A) Cr(OH)3 -4.09 under-saturated
Cr(OH)3(C) Cr(OH)3 -6.54 under-saturated
Amm2CrO4 (NH4)2CrO4 -10.53 under-saturated

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