Abstract
The dependence of the dissociation constants of oxalic acid on temperature and composition of ethylene glycol–water binary mixtures have been studied. Thermodynamic and extrathermodynamic analysis of the obtained results have been examined. The pK values have been correlated with the dielectric constant of the medium according to Born's electrostatic equation.
References
1.
Amira M.F.
,
Shazly Sh.A.El.
and
Khalil M.M.
, Thermochim. Acta (1987 ) 115 1 .
2.
Zaghloul A.A.
, Afinidad , (1996 ) 462 123 .
3.
Gonzalez A.G.
,
Rasales D.
,
Gonez Ariza J.L.
and
Sanz J.F.
, Analyt Chim Acta , (1990 ) 228 , 301
4.
Papanastasiou G.
,
Ziogas I.
and
Kokkinidis G.
, Analyt Chim Acta , (1993 ) 277 , 119 .
5.
Selim I.Z.
and
Ramadan M.S.H.
, Egypt, J.Chem. , (1993 ) 36 , 213 .
6.
Gonzalez A.G.
,
Rosales D.
,
Gomez Ariza J.L.
and
Sanz J.F.
, J. Phys. Org. Chem ; (1991 ) 4 , 87 .
7.
Borai A.A.
,
Ahmed I.T.
and
Hamed M.M.
, J.Chem. Eng.Data , (1996 ) 41 , 787 .
8.
Emara M.M.
,
Shehata H.A.
and
El-Samad M.S.
, Pak, J.Sci.Ind.Res , (1989 ) 32 , 71 .
9.
Mohamed M.T.
,
Zaghloul A.A.
and
Amira M.F.
, Bull.Fac.Sci.Alex , (1991 ) 31 , 116 .
10.
Monk C.B.
and
Amira M.F.
, J.Chem.Soc.Faraday I , (1980 ) 76 , 1773 .
11.
Monk C.B.
and
Amira M.F.
, J.Chem.Soc.Faraday I , (1978 ) 74 , 1170 .
12.
Lowe B.M.
and
Smith D.G.
, J.Chem.Soc.Faraday I , (1973 ) 69 , 1934 .
13.
Watkins K.O.
, and
Jons M. M.
Chem.Soc. , (1965 ) 725 .
14.
Sucha L.
and
Kotrly S.
, Solution Equilibria in Analytical Chemistry , Van Nostrand , London , 104 , 1972 .
15.
Budevsky O.
, Foundations of Chemical Analysis , Horwood, Chichester, A 136, 1979 .
16.
(a)
Dension J.T.
and
Ramsey J.B.
; J.Am.Chem.Soc. 77 , 2615 1955
17.
GilKerson W.R.
, J.Chem.Phys. , (1956 ) 25 , 1199 .
18.
Zaghloul A.A.
,
El Naggar G.A.
and
Amira M.F.
; Gazz. Chim. Ital. , (1996 ) 126 , 735
19.
Zaghloul A.A.
,
El Naggar G.A.
,
Shazly Sh.A. EL.
and
Amira M.F.
, Talanta , (1997 ) 45 (1 ), 189 .
20.
King E.J.
, J.Am.Chem.Soc. (1951 ) 73 , 155
21.
Marco D.D.
,
Giannetto A.
and
Linert W.
, Thermochim Acta , (1996 ) 286 , 387
22.
Born M.
, Z. Phys. , (1920 ) 45 , 1 .