PhreeqcUsers Discussion Forum

Reactive Transport => Reactive Transport Modelling => Topic started by: Pak on July 03, 2018, 03:42:09 PM

Title: Can be the non water H and O related to the pH?
Post by: Pak on July 03, 2018, 03:42:09 PM
I was just wondering if somebody knows if there is a way to relate the nonwater H and O given by iPhreeqc or PhreeqcRm with the pH.

Thank you
Title: Re: Can be the non water H and O related to the pH?
Post by: dlparkhurst on July 03, 2018, 05:04:59 PM
There is no simple relationship between non-water H and O and pH, at least in any system other than pure water. Note that non-water H and O includes species like SO4-2 and HCO3-.

The totals of every element, including H and O, plus the charge imbalance is sufficient to calculate the pH, pe, and distribution of species, but that requires solving the nonlinear set of mole balance and mass action equations.