To balance the chemical equation for the reaction between calcium chloride CaCl2 and sodium carbonate Na2CO3 to form calcium carbonate CaCO3 and sodium chloride NaCl , we need to ensure that the number of atoms of each element is equal on both sides of the equation.Here's the unbalanced equation:CaCl2 + Na2CO3 CaCO3 + NaClNow, let's balance the equation step by step:1. Balance the calcium Ca atoms:CaCl2 + Na2CO3 CaCO3 + NaCl 1 Ca on both sides, no changes needed 2. Balance the chlorine Cl atoms:CaCl2 + Na2CO3 CaCO3 + 2NaCl 2 Cl on both sides, added a 2 in front of NaCl 3. Balance the sodium Na atoms:CaCl2 + Na2CO3 CaCO3 + 2NaCl 2 Na on both sides, no changes needed 4. Balance the carbon C atoms:CaCl2 + Na2CO3 CaCO3 + 2NaCl 1 C on both sides, no changes needed 5. Balance the oxygen O atoms:CaCl2 + Na2CO3 CaCO3 + 2NaCl 3 O on both sides, no changes needed The balanced chemical equation is:CaCl2 + Na2CO3 CaCO3 + 2NaCl