Abstract
The Debye–Hückel and non-Debye–Hückel contributions to the Gibbs energy interaction parameters are investigated for electrolyte (E) + non-electrolyte (N) + water (W) systems. A method is proposed for calculating the interaction parameters, C DH n ,C N n , and C T n , which represent the Debye–Hückel, non-Debye–Hückel, and total contributions, respectively. Four ternary E + N + W systems are chosen and the interaction parameters are computed with different forms of the Debye–Hückel equation. Results show that: (1) the Gibbs energy interaction parameters between E and N can be divided into two parts: the Debye–Hückel contribution and the non-Debye–Hückel contribution, C T n =C DH n +C N n ; (2) the signs and magnitudes of the Debye–Hückel contribution to the interaction parameters, C DH n , depend mainly on the change in the dielectric constant of the solvent due to the addition of the non-electrolyte into the solvent; and (3) when the addition of the non-electrolyte only affects slightly the dielectric constant of the solvent, C DH1 (indicating the Debye–Hückel contribution to the interaction parameter for E + N) has a very small value and consequently can be neglected. In general, C DH1 is large, even larger than C N1 .
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Zhuo, K., Ren, Q., Zhao, Y. et al. Debye–Hückel Contributions to the Gibbs Energy Interaction Parameters for Ternary Electrolyte + Non-Electrolyte + Water Systems. J Solution Chem 37, 283–289 (2008). https://doi.org/10.1007/s10953-007-9232-4
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DOI: https://doi.org/10.1007/s10953-007-9232-4