NILERED / SCIENCE PHOTO LIBRARY NILERED / SCIENCE PHOTO LIBRARY
Sodium chloride formation. Sodium metal being heated using a blowtorch (right) before being lowered into an atmosphere of chlorine gas (green) in a conical flask. The chlorine was produced by adding hydrochloric acid to chlorine pellets. The sodium (Na) reacts vigorously with the chlorine (Cl2) to produce sodium chloride (NaCl), common table salt. The formation of this compound is a strongly exothermic process, releasing large amounts of energy.
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