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Determination of the Gas-phase Acidities of Oligopeptides
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Nitric acid: modeling osmotic coefficients and acid-base dissociation using the BIMSA theory

Alexandre Ruas1, Patrick Pochon, Jean-Pierre Simonin

  • 1CEA, Nuclear Energy Division, RadioChemistry & Processes Department, F-30207, Bagnols-sur-Cèze, France. alexandre.ruas@cea.fr

Dalton Transactions (Cambridge, England : 2003)
|October 14, 2010
PubMed

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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
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Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
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