The reaction between sodium carbonate (Na2CO3) and hydrochloric acid (HCl) results in the formation of sodium chloride (NaCl), water (H2O), and carbon dioxide (CO2). The balanced chemical equation for this reaction is:

Na2CO3(aq) + 2HCl(aq) → 2NaCl(aq) + CO2(g) + H2O(l)

So, the salt formed is sodium chloride (NaCl).