In {HEAD ~ an unbuffered water stream} containing {TAIL ~ minimum carbon dioxide} the pH change is quite rapid with minimal change in sodium hydroxide flow and a pH between 7.5 and 11 would be satisfactory 
containing
In { HEAD ~ an unbuffered water stream } containing { TAIL ~ minimum carbon dioxide } the pH change is quite rapid with minimal change in sodium hydroxide flow and a pH between 7.5 and 11 would be satisfactory
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH