lab evidence for chemical change answ
change. Laboratory Example: When hydrochloric acid (HCl) reacts with calcium carbonate (CaCO₃), carbon dioxide gas (CO₂) is released: \[ 2HCl (aq) + CaCO_3 (s) \rightarrow CaCl_2 (aq) + CO_2 (g) + H_2O (l) \] Observation