Effects of substrate orientation on underpotential monolayers of Pb and Tl deposited on single crystals

The behaviour of some cations was studied qualitatively in a medium of 1 M KOH and 0.25 M inositol and the half-wave potential values were determined. The behaviour of manganese complexes with this reagent (L) was studied in detail. It has been verified polarographically and potentiometrically that an anodic wave with E_1/2=0.65 V (SCE) corresponds to the oxidation of Mn(II)L to Mn(III)L and a cathodic wave with the same E_1/2 corresponds to the reduction of Mn(III)L to Mn(II)L. The conditional stability-constant value was determined for Mn(II)L using the substitution reaction between Mn(II)-EDTA and Mn(II)L. The effect of some anions and cations was studied from the point of view of analytical chemistry.