Alfisol, Item 007: IExFit, version 3.2
Fit adsorption data based on ion exchange reaction models.
Display solid & liquid & gas phase speciation diagrams as a funciton of pH and redox conditions.

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Add Solids

In the lower section here, you decide if solids are allowed to precipitate. If so, you also decide which ones are allowed or not allowed.

In the upper section here, you have the option to specify that solids exist in the experiment as initial conditions. If so, you also state how much is present either in mmol/L units or g/L units. You can also select "infinite" for hypothetical exercises. The formula weight (FW) and the reaction involved are shown in the bottom panel to help you select the correct solid species.

In the example shown below, eight solids were selected as allowed to exist. Of these eight, two of them must be allowed because they were also selected as solids initially present in the top panel. IExFit will not allow you to uncheck them as long as they are also selected in the top panel as "solids present".

IExFit will dissolve or precipitate these solid species as needed for each pH condition in the exercise.