The option ‘plot titration curve’ calculates the pH dependence of aqueous solutions by adding small portions of a given reactant (i.e. an acid, base or salt).
The right screenshot shows an example where 500 mM NaOH is added to the input water ‘C1.sol’.
By default aqion uses 50 reaction steps to perform this task. The results are displayed in form of diagrams:
The amount of data ready for visualization is immense. The data is grouped into three main classes (selected by the middle dropdown list):
- ELEMENTS: all relevant physico-chemical parameters (pH, pe, EC, alkalinity) and all total elemental concentrations
- IONS: all aqueous species (free ions and complexes)
- PHASES: amount of precipitated minerals and all saturation indices
- Show Data – opens a table with the numerical values of the two curves.
- Export Data – exports/saves the complete dataset into a plain text file (for Excel or other programs).
By right-click the mouse button over the diagram an additional popup menu opens. Also, hold the left button and move the mouse to zoom in.