Definition and Uses :
Calcium chloride chloride and production, water-soluble aquo complex [Ca (lH 2 O) 6 ] 2+ . In this way, these solutions are sources of "free" calcium and free chloride ions. This explanation is illustrated by the reaction of these solutions with phosphate sources to give a solid precipitate of calcium phosphate:
3 CaC 2 + 2 PO 3-
4 Ca → 3 (PO 4 ) 2 + 6 Cl -
Calcium chloride exhibits a very high enthalpy change, indicated by a significant temperature increase, upon dissolution of the anhydrous salt in water. This property forms the basis of its largest-scale application.
Molten calcium chloride can be electrolyzed to give calcium metal and chlorine gas.
CaC 2 , Ca + Cl → 2