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<p style="text-align: justify;">Ion association and solvation characteristics of Li<sup>+</sup>, Na<sup>+</sup> and K<sup>+</sup> ions in binary mixtures of 2-Aminoethanol + N,N-Dimethylacetamide probed by conductometry study at 298.15 K and 308.15 K</p>

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Title Statement <p style="text-align: justify;">Ion association and solvation characteristics of Li<sup>+</sup>, Na<sup>+</sup> and K<sup>+</sup> ions in binary mixtures of 2-Aminoethanol + N,N-Dimethylacetamide probed by conductometry study at 298.15 K and 308.15 K</p>
 
Added Entry - Uncontrolled Name Kumar, Suresh ; Markanda National College, Shahabad Markanda, Kurukshetra 136 135, Hariyana, India
Anand, Hardeep ; Department of Chemistry, Kurukshetra University, Kurukshetra 136 118, Hariyana, India
 
Uncontrolled Index Term Molar conductance, Solvation, Binary Mixtures, 2-aminoethanol, N,N-dimethylacetamide
 
Summary, etc. <p class="Abstract" style="text-align: justify;">Molar conductances (<em>Λ</em>) of LiClO<sub>4</sub>, NaClO<sub>4</sub>, KSCN, Bu<sub>4</sub>NSCN, Bu<sub>4</sub>NClO<sub>4</sub> and Bu<sub>4</sub>NBPh<sub>4</sub> in binary solvent mixtures of 2-aminoethanol (AE) and N,N-dimethylacetamide (DMA) containing 25, 50, 60, 80 and 100 mol% DMA have been measured at 298.15 K and 308.15 K in the concentration range of (30-500) × 10<sup>-3 </sup>mol kg<sup>-1</sup>. The conductance data of the electrolytes in the binary mixtures of AE+DMA are analyzed using Shedlovsky’s equation to evaluate limiting molar conductances (<em>Λ<sub>o</sub></em>), association constants (<em>K<sub>A</sub></em>), Walden products (<em>Λ<sub>o</sub>η<sub>o</sub></em>), hydrodynamic radii (<em>R<sub>H</sub></em>) and the standard free energies of association <em>(∆G<sub>A</sub><sup>0</sup></em>). The individual limiting ionic molar conductances are obtained using the reference electrolyte tetrabutylammonium perchlorate (Bu<sub>4</sub>NClO<sub>4</sub>) and tetrabutylammonium tetraphenylborate (Bu<sub>4</sub>NBPh<sub>4</sub>). A modified form of Stokes’ law helped to determine the solvated ionic radii (<em>r<sub>i</sub></em>) in solutions and are assessed in the facet of ion-ion, ion-solvent interactions and show structural changes in the binary mixtures. The results has revealed that the solvated radii (<em>r<sub>i</sub></em>) values of Li<sup>+</sup>, Na<sup>+</sup> and K<sup>+</sup> ions show preferential solvation of these ions by DMA in AE+DMA binary mixtures and these interactions get weaker with the increase in temperature. Also, the preferential solvation and ion-solvent interactions of these ions in binary mixtures are proved by the analysis of Walden products (<em>Λ<sub>o</sub>η<sub>o</sub></em>) and the standard free energies of association <em>(∆G<sub>A</sub><sup>0</sup></em>) with the effect of temperature.</p>
 
Publication, Distribution, Etc. Indian Journal of Chemistry (IJC)
2022-03-24 15:14:48
 
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http://op.niscair.res.in/index.php/IJC/article/view/61713
 
Data Source Entry Indian Journal of Chemistry (IJC); ##issue.vol## 61, ##issue.no## 3 (2022): Indian Journal of Chemistry-(IJC)
 
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