Polarographic Study of the Influence of Concentration and Nature of the Different Supporting Electrolytes on the Kinetics of the Irreversible Electrode Reactions of Ga(III) and Ge(IV)

Department of Chemistry, Agra College, Agra Manuscript received 22 July 1980, revised 3 January 1981, accepted 23 February 1981 The polarographic behaviour of Ga(III) and Ge(IV) has been studied at 25° in the presence of varying concentrations (0.05 –1.0M) of different supporting electrolytes, viz., NaNO2 , NaClO4, NaCl, KCl, KNO2, NH4Cl, NH4NO2, Ba(NO3 )2 , Sr(NO2)2, Ca(NO3)2, Mg(NO3)2 and Al(NO2)2. The reduction of both the depolarizers at d.m.e. has been found to be diffusion -controlled and irreversible. Koutecky’s treatment has been applied to calculate the rate constant (k\(f,n\)) at various potentials along the course of a polarogram in the presence of different supporting electrolytes. The values of the kinetic parameters ( \(\propto\)n\(a\) and k\(^o_f,\)\(n\) ) have been calculated as a function of the concentration of supporting electrolyte. Conclusions regarding the extent of irreversibility drawn from these parameters are found to be in conformity with each other