The power source connected to the cells produces a chemical reaction that produces {TAIL ~ a flow} of chlorine atoms into the body of {HEAD ~ water} for purifying the body of water 
The power source connected to the cells produces a chemical reaction that produces { TAIL ~ a flow } of chlorine atoms into the body of { HEAD ~ water } for purifying the body of water
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH