English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The combinatorial explosion of empirical parameters in tens of thousandspresents a tremendous challenge for extended Debye-H\"uckel models to calculateactivity coefficients of aqueous mixtures of most important salts in chemistry.The explosion of parameters originates from the phenomenological extension ofthe Debye-H\"uckel theory that does not take steric and correlation effects ofions and water into account. In contrast, the Poisson-Fermi theory developed inrecent years treats ions and water molecules as nonuniform hard spheres of anysize with interstitial voids and includes ion-water and ion-ion correlations.We present a Poisson-Fermi model and numerical methods for calculating theindividual or mean activity coefficient of electrolyte solutions with anyarbitrary number of ionic species in a large range of salt concentrations andtemperatures. For each activity-concentration curve, we show that thePoisson-Fermi model requires only three unchanging parameters at most to wellfit the corresponding experimental data. The three parameters are associatedwith the Born radius of the solvation energy of an ion in electrolyte solutionthat changes with salt concentrations in a highly nonlinear manner.

Poisson-Fermi Modeling of Ion Activities in Aqueous Single and Mixed Electrolyte Solutions at Variable Temperature