In the Solvay process mined calcium carbonate is heated in a kiln at 12000 C. for {HEAD ~ conversion} into lime stone CaO and {TAIL ~ CO2} 
into
In the Solvay process mined calcium carbonate is heated in a kiln at 12000 C. for { HEAD ~ conversion } into lime stone CaO and { TAIL ~ CO2 }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL