DATABASE C:\Program Files\USGS\Phreeqc Interactive 2.6\wateq4f.dat
# R.20.	Exercise
SOLUTION 1
END
USE solution 1
REACTION 1
	Pyrite	1 
	20 mmol
EQUILIBRIUM_PHASES 1
	O2(g)	-0.7
	Goethite	0.0	0.0
SAVE solution 2
END
USE solution 2
EQUILIBRIUM_PHASES 2
	O2(g)	-0.7
	Goethite	0.0	0.0
	Calcite
END