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Issue 8, 2013
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Speciation in aqueous solutions of nitric acid

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In this study, speciation in aqueous solutions of nitric acid at 25 °C was assessed in two independent ways. First, Raman experiments were carried out and interpreted in terms of free nitrate ions, ion pairs and neutral HNO3 molecules. In parallel, a model was developed to account for the formation of these two kinds of pairs. It was based on an extension of the binding mean spherical approximation (BiMSA), or associative MSA (AMSA), in which the size and the charge of the ions in the chemical pair may differ from those of the free ions. A simultaneous fit of the osmotic coefficient and of the proportion of free ions (obtained from Raman spectroscopy experiments) led to an estimation of the speciation in nitric acid solutions. The result obtained using this procedure was compared with the estimation obtained from the Raman experiments.

Graphical abstract: Speciation in aqueous solutions of nitric acid

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The article was received on 26 Sep 2012, accepted on 28 Nov 2012 and first published on 28 Nov 2012

Article type: Paper
DOI: 10.1039/C2DT32256K
Citation: Dalton Trans., 2013,42, 2853-2860
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    Speciation in aqueous solutions of nitric acid

    S. Hlushak, J. P. Simonin, S. De Sio, O. Bernard, A. Ruas, P. Pochon, S. Jan and P. Moisy, Dalton Trans., 2013, 42, 2853
    DOI: 10.1039/C2DT32256K

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