Physicochemical study of solution behaviour of alkali metal perchlorates prevailing in N,N-Dimethyl Formamide with the manifestation of ion solvation consequences

Roy, Mahendra Nath; De, Pritam; Sikdar, Partha Sarathi

doi:10.1016/j.molliq.2015.01.010

Cited by 1 publication

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equation (A4) can also be expressed using an empirical

coefficient instead of

, which is the case of the Masson’s equation [ 40 , 57 ]:

where the concentration is expressed in molal units and is the starting point of the RRM model. Negative slopes indicate ideal mixing of the solute with the solvent, with no solute-solute interactions, while positive slopes reflect the presence of non-negligible solute-solute interactions, as, for example, in ion pair formation [ 63 , 64 , 65 ]. The standard electrostrictive molar volume

is calculated using the intrinsic molar volume of the electrolyte

, which cannot be obtained from experiments [ 44 ].…”

Section: Appendix A1 Densitymentioning

confidence: 99%

The Lyotropic Nature of Halates: An Experimental Study

et al. 2022

View full text Add to dashboard Cite

Unlike halides, where the kosmotropicity decreases from fluoride to iodide, the kosmotropic nature of halates apparently increases from chlorate to iodate, in spite of the lowering in the static ionic polarizability. In this paper, we present an experimental study that confirms the results of previous simulations. The lyotropic nature of aqueous solutions of sodium halates, i.e., NaClO3, NaBrO3, and NaIO3, is investigated through density, conductivity, viscosity, and refractive index measurements as a function of temperature and salt concentration. From the experimental data, we evaluate the activity coefficients and the salt polarizability and assess the anions’ nature in terms of kosmotropicity/chaotropicity. The results clearly indicate that iodate behaves as a kosmotrope, while chlorate is a chaotrope, and bromate shows an intermediate nature. This experimental study confirms that, in the case of halates XO3−, the kosmotropic–chaotropic ranking reverses with respect to halides. We also discuss and revisit the role of the anion’s polarizability in the interpretation of Hofmeister phenomena.