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