{TAIL ~ Calcium bicarbonate} is then processed by a cation exchange system to produce {HEAD ~ soda carb} such that: 
{ TAIL ~ Calcium bicarbonate } is then processed by a cation exchange system to produce { HEAD ~ soda carb } such that :
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH