Most mono-and di-valent salts will fully dissociate in water to form separately hydrated negative and positive ions. The first shell of water molecules around these ions is very tightly bound, primarily through strong, local electrostatic forces. For some of the transition metal salts the dissociation is incomplete at high concentrations, and a fraction of the negative and positive ions remain associated in a structure known as a contact-ion pair.
Revised: August 19, 2010 |
Published: August 30, 2001
Citation
Fulton J.L., M.M. Hoffman, J.G. Darab, B.J. Palmer, and E.A. Stern. 2001.Ion Hydration and Ion-Pair Formation in Water. In Advanced Photon Source Forefront 1, ANL/APS/TB-42. 83-85. Argonne, Illinois:Argonne National Laboratory.PNNL-SA-35115.