CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY
Acid + alkali. Formation of ammonium chloride fog above two containers placed next to each other. One contains hydrochloric acid (HCl), the other ammonium hydroxide (NH4OH). The vapours generated by the two solutions mix in the air above the containers, reacting to form ammonium chloride and water: HCl + NH4OH -> NH4Cl + H2O This reaction is typical of acid neutralisation by an alkali.
Model release not required. Property release not required.