Of course, it depends upon what metals one is most concerned about. A general formula, analogous to the Langelier Index, is what can be called a saturation index (SI), or SI = log10(Q/Ksp) in which Q = the ion activity productKsp = the solubility constant for the given temperature The interpretation is as follows, again similar to Langelier Index for CaCO3 saturation: SI> 0 = supersaturation SI = 0 = saturation equilibrium SI < 0 = undersaturation. Concentrations, in most aqueous solutions with reasonable ionic strength, can be substituted for activities. Hope this helps!
Published by John Cook, CEO and Engineer at Advanced Data Mining Intl
Of course, it depends upon what metals one is most concerned about. A general formula, analogous to the Langelier Index, is what can be called a saturation index (SI), or
SI = log10(Q/Ksp) in which
Q = the ion activity productKsp = the solubility constant for the given temperature
The interpretation is as follows, again similar to Langelier Index for CaCO3 saturation:
SI> 0 = supersaturation
SI = 0 = saturation equilibrium
SI < 0 = undersaturation.
Concentrations, in most aqueous solutions with reasonable ionic strength, can be substituted for activities.
Hope this helps!
SI = log10(Q/Ksp) in which
Q = the ion activity productKsp = the solubility constant for the given temperature
The interpretation is as follows, again similar to Langelier Index for CaCO3 saturation:
SI> 0 = supersaturation
SI = 0 = saturation equilibrium
SI < 0 = undersaturation.
Concentrations, in most aqueous solutions with reasonable ionic strength, can be substituted for activities.
Hope this helps!