As.ppi
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SPECIATION
calculationType ht1
calculationMethod 1
mainSpecies As
xmin 2.0
xmax 12.0
ymin -90.0
ymax 0.0
resolution 200
PLOT
plotTitle "As-H<sub>2</sub>O-O<sub>2</sub>-H<sub>2</sub>O<br>(dominant species)"
xtitle pH
ytitle "log <i>f </i>O<sub>2</sub>(g)"
extraText "extratextAs.dat"
CHEMISTRY
include ht1.inc # standard 'hunt and track' file
SOLUTION 1
temp 20
units mol/kgw
As 1e-3 # total As
Na 1e-1 # background electrolyte
Cl 1e-1 charge
END
USE solution 1
EQUILIBRIUM_PHASES 1
Fix_H+ -<x_axis> NaOH # <x_axis> is pH so reverse sign
-force_equality true
O2(g) <y_axis> 0.1
END
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