Complex Formation between Lead(II) Ions and Acetate Ions

THE complex formation between lead (II) and acetato ions has been examined at 25° C with 3 M (Na)ClO 4 as the ionic medium. The equilibrium constants were determined by potentiometric titrations at which the free lead concentration, [Pb 2+ ], was measured with a lead amalgam electrode and a ‘Wilhelm’ reference bridge of the type: In each series the analytical lead concentration, C Pb 2+ was kept constant while the ligand concentration was varied. In order to avoid hydrolysis of the lead ions a suitable amount of perchloric acid was added to the lead perchlorate solutions.