The high-frequency polarogram of Zn(II) was studied and the electrode processes were discussed on the basis of the change of wave-shapes. The electrode process in perchlorate less than 0.2 M (at 25℃) seemed to be the simple two-electron process, but to be the successive stepwise mechanism to pass Zn^+ intermediate in the salt more than 0.25 M. The temperature dependence of the polarogram in 0.15 M perchlorate was investigated and the transition of the electrode process was found at 15℃. The effects of halide ions and thiocyanate ion on the wave-shape were investigated and the enhancements of the wave height according to the addition of anions were found. The order of the magnitude was as follows: I^- >SCN^->Br^->C1^-. It was clarified that i_total (Fig. 1) should be adopted for the discussion of the overall electrode process since the first and the second wave of the H. F. polarogram of Zn(II) both participated in the Zn^2+/Zn(Hg) exchange reaction.
Mendeley出力
