Note E — Chapter XV · OXIDATION AND REDUCTION. II. OXIDATION BY OXYGEN, PERMANGANATES, ETC.; OXIDATION OF ORGANIC COMPOUNDS
Reading edition
Calculated from the data of Richards and Behr (Z. phys. Chem., 58, 301 (1907)), who found the potential of iron against 0.5 molar FeSO4 to be −0.15 volt. The degree of ionization of 0.5 molar FeSO4 is taken as 22%. [Λ = 25.8 (Kohlrausch and Holborn, loc. cit., p. 152) and Λ∞ is taken as 117, as for ZnSO4 (ibid., p. 200).] On account of the doubtful value for the degree of ionization, the values in the table are marked?, but the value found by Richards and Behr appears to be quite accurate.