What is Calcium chloride?
[[File:Calcium chloride.jpg|thumb|Calcium chloride]] '''Calcium chloride''' is a chemical compound made of calcium and chlorine atoms. It has the formula of CaCl<sub>2</sub>. It absorbs water from the air and releases heat when it is [[solution|dissolved]] in water. It is used as a de-icer on roads to melt the ice. It can be formed by mixture of [[calcium oxide]] with [[hydrochloric acid]], but this produces a version that is hydrated (has water molecules attached to it). The anhydrous (no water molecules attached) form is needed most of the time. Calcium chloride is melted at a high temperature and [[electrolysis|electrolyzed]] to produce [[calcium]] metal. {{chem-stub}} [[Category:Chlorine compounds]] [[Category:Calcium compounds]]