Author : Edan Salmanand, Hamieda
Ion-Pair Formation of Tetramethylammonium bromid in Hydroxypropylmethylcellulose-WaterMixtures from Conductivity Measurements
journal of kerbala university,
2013, Volume 9, Issue 4, Pages 117-124
The equivalent conductivity (Λ) at different concentrations of (CH3)4NBr Tetrametylammonium bromide (TMAB) solution in hdroxypropylmethylcellulose(HP MC)-water mixtures at 25˚C has been determined from direct conductance measurements. The association constant (Ka) for ion-pair formation and the equivalent conductivity of the electrolyte at infinite dilution (Λە) in the different mixtures component by a least square method with an appropriate computer programme using Shedlovsky method. Density, viscosity and dielectric constant, have been measured for all the solvent mixtures at 25˚C.Walden products (W) have been calculated from the (Λە) and the viscosities (ηᵒ) of the HPMC-water mixtures.