Caught in the Act of Dissolution

See allHide authors and affiliations

Science  04 Oct 2002:
Vol. 298, Issue 5591, pp. 69
DOI: 10.1126/science.1076959

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution


The ionic dissociation of acids such as HCl and HBr in water is driven by a substantial energy release when the ions are formed in an extended medium. But how many water molecules does it take to trigger this dissociation? In their Perspective, Robertson and Johnson highlight the report by Hurley et al., who have answered this question for the case of HBr. Their experiments on small water clusters indicate that just five water molecules are enough to ionize HBr.