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How Do You Make 1 Drop of Hydrochloric Acid?
- Posted at 11:09 AM on Jun. 24, 2009 by ausetute Chemists have discovered that it requires exactly 4 water molecules and 1 hydrogen chloride molecule to form 1 droplet of hydrochloric acid. The study was conducted on single molecules of water and hydrogen chloride cooled to -272.8oC, just a little above absolute zero, using infra-red spectroscopy to follow the reaction. When water molecules are added to the hydrogen chloride molecule, no reaction occurs until the fourth water molecule has attached to the hydrogen chloride molecule. At this point a proton (H+) from the hydrogen chloride molecule is transferred to a water molecule to form the hydronium ion (H3O+). The reaction mechanism is called aggregation induced dissociation. Anna Gutberlet, et al. Below 1 K: The Smallest Droplet of Acid Aggregation-Induced Dissociation of HCl(H2O)4. Science, 324, 1545 (2009) DOI: 10.1126/science.1171753 Post Comment
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