Densities, Viscosities [from (278.15 to 318.15) K], and Electrical Conductivities (at 298.15 K) of Aqueous Solutions of Choline Chloride and Chloro-Choline Chloride

Abstract

Data for the electrical conductivity (at 298.15 K), density, and viscosity [both at (278.15, 288.15, 298.15, 308.15, and 318.15) K] of aqueous solutions of choline chloride (ChCl) and chloro-choline chloride (Cl-ChCl) are reported for solute molalities m ≲ 2.0 mol·kg–1 (ChCl) and ≲ 2.1 mol·kg–1 (Cl-ChCl), respectively. From the densities apparent molar volumes were calculated, and the limiting partial molar volumes and Hepler's constants of ChCl(aq) and Cl-ChCl(aq) were evaluated. From the viscosities Arrhenius activation energies of viscous flow were determined. While apparent molar volumes suggest at best weak ion pairing for ChCl(aq) and Cl-ChCl(aq), the Walden product obtained for 25 °C hints at significant ion–ion interactions and/or changes in ion hydration with increasing concentration.

Hydration and sodium-ion binding of trifluoroacetate in aqueous solution

“…The value of κ for the solutions can be determined, in principle, either from conventional low-frequency conductance measurements [13], as are the conductivities listed in Tables 1 and 2, or as an additional parameter in the fitting of the DRS data [18]. In practice, for Table 1 Densities, ρ, electrical conductivities, κ, limiting permittivities, ε j , relaxation times, τ j , and values of the reduced error function, χ r 2 , for NaOAcF 3 (aq) at concentrations, c, and 25°C.…”

“…Solution densities, ρ, required for the interconversion of molality to molarity were measured using a vibrating-tube densimeter (Anton Paar DMA 5000 M, calibrated by the manufacturer) with a stated uncertainty of ±0.05 kg m − 3 . Electrical conductivities of the solutions, κ, were measured with an uncertainty of ±0.5% using a computer-controlled setup described previously [13].…”

Dynamics of RTILs: A comparative dielectric and OKE study

“…Viscosities, η, were measured with a rolling ball microviscometer (Anton Paar, Graz, Austria, AMVn) with ∼ 0.5 % repeatability in the range of 5 to 125°C. Electrical conductivities, κ, were determined in the temperature range of -45 to 190°C with an overall uncertainty of 0.5 % using the two setups described previously [31,32].…”

Evidence for cooperative Na+ and Cl− binding by strongly hydrated l-proline

“…Electrical conductivities, k, were obtained at (25 AE 0.005) 1C with a relative uncertainty in k of 0.005 using the setup and following the procedure described previously. 37,38 The obtained data for r are included in Tables 1 and 2, and those for k are given in Table 2.…”