Note 577 — Chapter XV · OXIDATION AND REDUCTION. II. OXIDATION BY OXYGEN, PERMANGANATES, ETC.; OXIDATION OF ORGANIC COMPOUNDS

In other instances, the action of the hydrogen-ion in facilitating and accelerating chemical actions (often called its "catalytic effect") has been explained, in a similar fashion, as being based on salt formation, followed by the ionization of the salts formed, the active components being the ions (vide, for instance, Bredig, Z. für Elektroch., 9, 118 and 10, 586 (1904) and Stieglitz, Report of the Congress of Arts and Sciences, St. Louis, 4, 276 (1904) and Am. Chem. J., 39, 29, 415 (1908) and later articles). In many of these cases, the ion concentrations of the reacting components have not yet been accessible to direct measurements, but the viewpoint has been sustained by quantitative studies of analogous reactions, which were selected for study, because the factors involved could be measured (cf. Stieglitz, loc. cit.).