The reaction between calcium chloride CaCl2 and sodium carbonate Na2CO3 is a double displacement reaction, also known as a metathesis reaction. In this reaction, the cations Ca2+ and Na+ and anions Cl- and CO3 2- switch places, forming new compounds. The balanced chemical equation for this reaction is:CaCl2 aq + Na2CO3 aq CaCO3 s + 2 NaCl aq The products of the reaction are calcium carbonate CaCO3 and sodium chloride NaCl . Calcium carbonate is a solid that precipitates out of the solution, while sodium chloride remains dissolved in the aqueous solution.