First sorry for the low level question but I’m stock…
I’m modeling cement paste with PHREEQC and particular binding of different ions in the pore solution. I work with a surface model, with silanol sites. The amount of silanol sites is relative to CSH particle, described as a pure solid phase in the model.
My problem is the literature data of the silanol sites, where I have found estimated values of 4.8 sites/nm^2 and specific surface area of CSH, 250916 m^2/mol. From this one can determine sites/mol, which is relative large number. The problem is that PHREEQC takes the input mol/mol of CSH to determine the amount of surface sites. So how is surface sites related to mol?
Maybe I understand the basic completely wrong and it can’t be done!