Answer:
When sodium sulfate (Na2SO3) reacts with hydrochloric acid (HCl), the reaction produces sodium chloride (NaCl), water (H2O), and sulfur dioxide (SO2).
2. Hydrochloric acid (HCl) reacts with calcium carbonate (CaCO3) to form calcium chloride (CaCl2), carbon dioxide (CO2), and water (H2O).