carbonspeciationvsph(species1).ppi

SPECIATION
  calculationType                      species             # plot %C species vs pH
  calculationMethod                    1
  mainSpecies                          C
  xmin                                 2                   # controls the range of pH plotted
  xmax                                 13
  resolution                           100                 # controls the number of points on each curve
PLOT
  plotTitle                            "C speciation vs pH<br>using speciesvsph.inc"
  extraText                            "extratextcarbonspeciation.dat"
#  pxmax                                13

CHEMISTRY

include 'speciesvsph.inc'                                  # this file exports the required x-axis(pH), y-axis (%) value pairs. Edit as required.

PHASES
Fix_H+
   H+ = H+
   log_k 0.0
SOLUTION 1
   temp      10                                            # carbonate speciation at least depends on temperature
   pH        7
   units     mol/kgw
   C(4)      1e-1 as HCO3                                  # total C
   Na        0.1 charge                                    # background electrolyte
   Cl        0.1
END

USE solution 1
EQUILIBRIUM_PHASES
   Fix_H+  -<x_axis>  NaOH 10
     -force_equality true
END