ion association

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The electrostatic attraction between ions in solutions of electrolytes that causes them to associate in pairs. As a result, complete dissociation does not take place and experimentally found electrical conductivities are lower than those predicted by the Debye-Hückel theory. In 1926, Neils Bjerrum (1879–1958) proposed improving the Debye-Hückel theory by taking ion association into account. He found that the significance of ion association increases as the relative permittivity of the solvent decreases.

Subjects: Chemistry.

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