Energy and the Formation of Ions Lecture Demonstrations
Formation of NaCl
Molten sodium reacts with chlorine  gas, or a piece of sodium can be placed in sand at the bottom of a 1L graduated cylinder, which is then filled with chlorine. The reaction is started with a drop of water on the sodium. A salt shaker can be hidden in the sand, and removed for a touch of humor.
Alternatively, approximately 20 mL each of fresh chlorine bleach and concentated hydrochloric acid can be added to a 1 or 2 L graduated cylinder, and a small piece of sodium added. A fog of NaCl crystals results from the energetic reaction.
- ↑ J. Chem. Educ., 1996, 73 (6), p 539