Buchner, Richard and Chen, Ting and Hefter, Glenn (2004) Complexity in "simple" electrolyte solutions: Ion pairing in MgSO4(aq). JOURNAL OF PHYSICAL CHEMISTRY B, 108 (7). pp. 2365-2375. ISSN 1520-6106, 1520-5207
Full text not available from this repository. (Request a copy)Abstract
A detailed investigation of aqueous solutions Of MgSO4 has been made by dielectric relaxation spectroscopy over a wide range of frequencies (0.2 less than or equal to v/GHz less than or equal to 89) and concentrations (0.017 less than or equal to c/M less than or equal to 2.24). Detailed analysis of the spectra shows conclusively, as has long been inferred from ultrasonic absorption studies, the simultaneous presence of double solvent separated (2SIP), solvent-shared (SIP), and contact (CIP) ion pairs. The constants derived for the stepwise formation of each ion pair type and for the overall association are in excellent agreement with literature estimates based on other kinds of measurements. In addition, evidence has been obtained for the existence of a triple ion, Mg2SO42+(aq), or possibly a more aggregated species, at high electrolyte concentrations (c > 1 M). Support for the presence of CIPs, SIPs, and the triple ion is provided by Raman spectroscopy. The implications of the present findings for quantitative models of the thermodynamic behavior of higher-valent electrolytes are briefly discussed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MAGNESIUM-SULFATE SOLUTIONS; MOLECULAR-DYNAMICS SIMULATION; FOLGE CHEMISCHER RELAXATION; THZ REFLECTION SPECTROSCOPY; DIELECTRIC-RELAXATION; OSMOTIC COEFFICIENTS; ISOPIESTIC DETERMINATION; SOLVENT RELAXATION; AQUEOUS NA2SO4; LIQUID WATER; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 22 Jul 2021 10:21 |
| Last Modified: | 22 Jul 2021 10:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37990 |
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