Thermodynamics of the dissociation of amino acid in mixed solvents. 2. Glycine in 0.1 mole fraction 1,2-propanediol-water, as 278.15-318.15 K

Abstract

The dissociation of aqueous trifluoromethanesulfonic acid (TFMSA) in the range 5-100 wt % has been studied by Raman spectroscopy and a values have been determined from integrated intensity of the band of the sulfonate group at 1035 cm"1 relative to that of the C-S stretching at 770 cm"1 taken as reference. Discrepancies are observed in comparison with previous IR estimates mainly at low acidities, and the possible reasons of the disagreement are discussed. The new results of TFMSA are compared with that of some other strong acids.

Volumetric properties of room temperature ionic liquid 1. The system of {1-methyl-3-ethylimidazolium ethyl sulfate+water} at temperature in the range (278.15 to 333.15) K

“…The values of / E calculated from equation (17) and are listed in table 7. TABLE 3 The values of parameters, q i , of equation (10) and the standard deviation, s, of the fits q 0 · 10 2 q 1 q 2 · 10 5 q 3 · 10 3 q 4 q 5 · 10 6 5.8986 0.74152 À7.4957 À2.6962 0.2993 4.9377 q 6 · 10 2 q 7 q 8 · 10 5 q 9 · 10 5 s · 10 5 3.5281 À3.5232 À8.3770 1.6722 5.4 …”

“…Therefore, its properties may be treated by PitzerÕs electrolyte solution theory [13][14][15], which is a semi-empirical theory based upon a virial series plus a Debye-Huckel term. Many binary ionic systems have been successfully treated by PitzerÕs equations [16][17][18]. As a continuation of our previous investigations of room temperature ionic liquid [19][20][21][22], this paper reports volumetric properties of aqueous solution of ionic liquid EMISE: the densities of aqueous solutions of EMISE with different molalities up to 3.0 mol À1 AE kg À1 at temperatures in the range (278.…”

Part I: Thermodynamic analysis of volumetric properties of concentrated aqueous solutions of 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-2,3-dimethylimidazolium tetrafluoroborate, and ethylammonium nitrate based on pseudo-lattice theory

“…We used interaction models developed for diluted solutions. There have been previous attempts to do this, generally starting from the relations of Pitzer [4][5][6] without, however, planning to include description of the pure ionic liquid. We considered the ''pseudo-lattice theory'' approach which supposes that electrolyte solutions are structured media [7,8].…”

Studies on the relationship between Pitzer’s equation and medium effect: the system of HCl+H2SO4 in {0.06455C2H5OH+0.93545H2O}

“…As far it goes, many papers about such investigations [1][2][3][4][5][6][7][8][9][10] are available.…”