The H2O–D2O solvent isotope effects on the molar volumes of alkali-chloride solutions at T=(288.15, 298.15, and 308.15)K

The effect of specific background electrolytes on water structure and solute hydration: Consequences for crystal dissolution and growth

“…The water-water interaction due to the influence of the solute decreases and the structural temperature (activity) of water increases on decreasing DE i (Jakli, 2007). According to the hydration characteristics of background electrolytes used in our experiments, the dynamics of solvent structure (E 0-salt ) in respective solutions will increase in the order: LiCl < NaCl < KCl and NaF < NaCl.…”

Evaluation of individual ionic partial molar volumes in aqueous solutions

“…In figure 1, the unique DV ion ð H-DÞ -behaviour of the ''outsider" Li + value, i.e., its position out of the monotonic radius dependence, has been attributed to a hydroniumlike hydration structure [9].…”

“…In a recent MVIE-study on the alkali metal chloride solutions [9], it has been concluded that the IE on the standard partial molar volume (V 2 ðH 2 OÞ À V 2 ðD 2 OÞ ¼ DV According to the multilayer hydration model of Frank and Wen [10], this 1/r ion -behaviour of the MVIEs of the cations and chloride could be rationalized using only the (electrostatic) electrostriction component, V elect of V ion [9]. Due to the fact that the model V ion can be considered to arise from three major components, i.e., from a negative electrostriction, V elect , a positive disorder, V disord , and from the intrinsic, V intr (ffi crystal, V cryst ) partial molar volumes,…”

“…The kinetic hydrated radii, r hydr (the corrected Stokes radii of the alkali and halide ions), have been determined by Nightingale [11], evaluated from the directly measurable single-ion mobility and conductivity. The r ion and r hydr data of the alkali metal and halide ions are tabulated in [9]). …”

“…The r ion -dependences of the DV ion ðH-DÞ and V cosph values are shown in figures 1 and 2 (DV ion ðH-DÞ , r hydr , and r ion values taken from [9]). It is apparent that with the cationic and anionic V cosph data both their monotonic trend and their relative sizes correlate well with those of the DV ion ðH-DÞ .…”