Inconsistency between ts_pH and Variable Boundary Conditions

[Marlon Mederos]

Hi, I have simplified the study model because I found bad results in my model and have gone back to try to correct this.
I have stated a 10^-7 mM aqueous species of CaCl2 (1001) and a 3002 of 10 mM, in both the pH will be calculated to charge the solution. There is a single pulse with the 3002 solution during the whole time. The pH as a result of speciation is 7.008 and 6.985, respectively; however, when I plot the ts_pH with GnuPlot it shows a pH at the output of 12. Why does this happen? Thank you very much for your time. Regards.

[diederik]

Difficult to say based on this description,

could you send me (djacques@sckcen.be) the project files,

thanks
diederik

[Marlon Mederos]

Hi, the problem was that, if I declared high or low concentrations fixed the pH, it did not give the same result, which is not logical, but I have found the source of the error. As I understand that it may be a common mistake in those of us who are starting in this amazing world of Hydrus, I would like to share the cause of the error and the base files, in case any colleague has the same doubt.
It should be remembered that Hydrus performs speciation of the declared elements and that the "charge" command should be used to calculate the pH or set the pH and calculate the amount of an element to be added or removed. On the other hand, all elements present in the reactions, even if at very low concentrations, must be declared as well as declared for transport in Hp1-Components.
Thank you very much dear Diederik, not only for your prompt answer, but also for being always ready to help us in our doubts and to make sure that our investigations reach a safe harbor. Best regards.