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