In this research, influence of some ionic liquids on the electrical conductivity of L(+)-lactic acid (LaH) have been investigated in aqueous polyethylene glycol 20000 (PEG) solutions. The molar conductivities of LaH in water, aqueous solutions of PEG and (PEG t ionic liquid,1.hexyl.3.methylimidazoliumbromide [C6mim]Br/1.octyl.3.methylimidazolium bromide[C8mim]Br) were measured at T = (288.15 to 318.15) K. These data have been analyzed by Quint.Viallard (QV) conductivity equation and the limiting molar conductivities and dissociation constants (K_D) were calculated by this equation. The results demonstrate that the values of limiting molar conductivities decrease with increasing concentration and longer alkyl chain length of the ionic liquids. The K_Dvalues were also used to calculate the dissociation standard thermodynamic functions Delta(G, S and H). The values of Delta G are positive and become more positive at higher temperatures. This implies that the dissociation of the acid is a non spontaneous process in standard state.
Compounds
#
Formula
Name
1
H2O
water
2
C3H6O3
(S)-2-hydroxypropanoic acid
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.