Properties
Calcium chloride can serve as a source of calcium ions in a solution, as calcium chloride is soluble. This property can be useful for displacing ions from solution. For example, phosphate is displaced from solution by calcium:
- 3 CaCl2 (aq) + 2 K3PO4 (aq) → Ca3(PO4)2 (s) + 6 KCl (aq)
Molten calcium chloride can be electrolysed to give calcium metal and chlorine gas:
- CaCl2 (l) → Ca (s) + Cl2 (g)
Calcium chloride has a very high enthalpy change of solution.
The anhydrous salt is deliquescent; it can accumulate enough water in its crystal lattice to form a solution.
Read more about this topic: Calcium Chloride
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