DATABASE C:\Program Files\USGS\Phreeqc Interactive 2.6\phreeqc.dat
# IS.4 Exercise
SOLUTION_SPREAD
 pH	 C
  4	 1
  5	 1
  6	 1
  7	 1
  8	 1
  9	 1
 10	 1
 11	 1
 12	 1
SELECTED_OUTPUT
    -file                 totalc.sel
    -reset                false
    -ph                   true
    -molalities           CO2  HCO3-  CO3-2
END