Studying the thermodynamic dissociation constants of monochloroacetic acid in mixture of ethanol - water

Abstract

This work reports the specific conductivities of monochloroacetic acid
electrolyte in a binary mixture solvent of ethanol and water that it covered three
solvent compositions ; 0.0586 , 0.0855 and 0.1108 measured in a temperture range
from 298.15 to 318.15 K . The molar conductivities of the monochloroacetic acid
electrolyte are treated by employing the Debye – Huckel –Onsager ( DHO) equation .
The limiting molar conductivities of monochloroacetic acid electrolyte , classical
dissociation constants and the degree of dissociation are etimated . Furthermore , the
thermodynamic dissociation constants " K " and standard thermodynamic functions
of the dissociation process are calculated and discussed . Walden product , corrected
Stokes radius and the energy of activation at limiting dilution for the movement of
CICH₂COO- and H₃O+ ions are determined . The results showed the important role
for the dielectric constant and the viscosity of mixture of ethanol and water in all
values .