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Title: Solvation behaviour of chloramine-T in solvent mixtures at different temperatures
Authors: Bhat, J Ishwara
Sabitha, N V
Issue Date: Jan-2004
Publisher: CSIR
IPC Code: G01N27/00
Abstract: The solvation behaviour of chloramine-T in water and different compositions of water + co-solvent (dioxan, propan-2-ol and propan-1-ol) at 278, 288, 298 and 318K have been studied on the basis of conductivity principle. Experimentally obtained conductivity data are analysed by Kraus-Bray and Shedlovsky conductivity models to obtain limiting molar conductance, dissociation and association constants. Limiting molar conductance decreases with the increasing amount of co-solvent in water at all temperatures. Preferential solvation of cation by the co-solvent is identified. Thermodynamics of association in case of water + dioxan and dissociation in case of water + propan-2-ol and water + propan-1-ol are computed. Exothermic behaviour of solvation is observed. Ion pair formation constant (KP) and triple ion formation constant (KT) are determined from Fuoss-Accascina equation. KP is found to be higher than KT in all the cases, indicating the higher magnitude of association involved in the system. Solvation number is also calculated by a new model and is found to be fractional.
Page(s): 17-22
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.11(1) [January 2004]

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