The concentration of the para aminoacetanilide is determined by a color test in which {HEAD ~ the para aminoacetanilide} was reacted with {TAIL ~ phenol} 
reacted with
The concentration of the para aminoacetanilide is determined by a color test in which { HEAD ~ the para aminoacetanilide } was reacted with { TAIL ~ phenol }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL