Browsing by Author "Hassen, Hamid"

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    Ion Transfer and Double Layer Studies Across the 1fater/O-Dichlorobenzene Interface
    (Addis Ababa Universty, 1991-06) Hassen, Hamid; Solomon, Theodros (PhD)
    ]:on trflns:fer a cross the ,~" ter/ o-di chlorobenzene int~r:face hfls been investigated by ac cyclic voltammetry :from the peak o:f which the hal:f-wa~e potentials of the ion studied hflve been determined. The zero point on the ;~'-P -scAle has been fixed using 10 mH PNPDOO saturated with TPAsTPB as a base elecitrolyte in o-DOB. A wide potential window has also been obtained by employing tetrfldodecylflmmonium dicarbolly1cobfl1tate (III) (TDADOO), flS supporting electrolyte in o-DOB. The values of the standard Galvani potential difference and the standard Gibbs energies of partition far individual ions in o-DOB have been evaluated tflking into account ion association in o-DOB. The association constant of the base electrolyte in o-DOB has been determined from conductivity measurements. The standard Gibbs energies of partition for some ions in the water/o-DOB system hAve also been determined from solubility experiments. These have been compared ,dth the values obtained from voltammetric experiments. Preliminary stuiies on the electrical double layer across the ,vater/o-DOB interface have been made using the impedance technique. The experimental interfacial capacitance have been compared with the theoretical diffuse layer capacit?onces calCUlated by the GouyChapman theory.