TY - JOUR
T1 - Thermodynamics of hydrochloric acid in propylene carbonate-water mixtures from e.m.f. measurements between 5 and 45 °C
AU - Roy, Rabindra N.
AU - Vernon, William
AU - Gibbons, James J.
AU - Bothwell, Alfred L.M.
PY - 1971
Y1 - 1971
N2 - E.m.f. measurements of cells of the type Pt,H2(g, 1 atm)|HCl(m), PC(X), H2O(100 - X)|AgCl, Ag at five temperatures from 5 to 45°C have been used to derive (i) the standard potentials of the Ag-AgCl electrode, (ii) the mean molal activity coefficient of HCl, (iii) the primary medium effects, and (iv) the thermodynamic constants for the transfer of HCl from water to the respective propylene carbonate-water mixtures. The molality of the acid ranged from 0·005 to 0·2 mol kg-1. The standard e.m.f. varied with temperature (t/°C) according to equations (a)-(c) where X = % (W/W) of propylene carbonate. The results of the thermodynamic functions have been interpreted in terms of the acid-base properties and the breakdown of the solvent structure. (a) Em°(X = 5) = 0·2209 - 5·635 × 10-4(t - 25) - 3·293 × 10-6(t - 25)2 (b) Em°(X = 10) = 0·2188 - 5·843 × 10-4(t - 25) - 5·165 × 10-6(t - 25)2 (c) Em°(X = 20) = 0·2130 - 6·616 × 10-4(t - 25) - 2·725 × 10-7(t - 25)2.
AB - E.m.f. measurements of cells of the type Pt,H2(g, 1 atm)|HCl(m), PC(X), H2O(100 - X)|AgCl, Ag at five temperatures from 5 to 45°C have been used to derive (i) the standard potentials of the Ag-AgCl electrode, (ii) the mean molal activity coefficient of HCl, (iii) the primary medium effects, and (iv) the thermodynamic constants for the transfer of HCl from water to the respective propylene carbonate-water mixtures. The molality of the acid ranged from 0·005 to 0·2 mol kg-1. The standard e.m.f. varied with temperature (t/°C) according to equations (a)-(c) where X = % (W/W) of propylene carbonate. The results of the thermodynamic functions have been interpreted in terms of the acid-base properties and the breakdown of the solvent structure. (a) Em°(X = 5) = 0·2209 - 5·635 × 10-4(t - 25) - 3·293 × 10-6(t - 25)2 (b) Em°(X = 10) = 0·2188 - 5·843 × 10-4(t - 25) - 5·165 × 10-6(t - 25)2 (c) Em°(X = 20) = 0·2130 - 6·616 × 10-4(t - 25) - 2·725 × 10-7(t - 25)2.
UR - https://www.scopus.com/pages/publications/9744234680
UR - https://www.scopus.com/pages/publications/9744234680#tab=citedBy
U2 - 10.1039/J19710003589
DO - 10.1039/J19710003589
M3 - Article
AN - SCOPUS:9744234680
SN - 0022-4944
SP - 3589
EP - 3592
JO - Journal of the Chemical Society A: Inorganic, Physical, and Theoretical Chemistry
JF - Journal of the Chemical Society A: Inorganic, Physical, and Theoretical Chemistry
ER -