Note 18 bis — Chapter XXI · CHROMIUM, MOLYBDENUM, TUNGSTEN, URANIUM, AND MANGANESE
George Kamensky translation
On comparing the manganates with the permanganates—for example, K2MnO4 with KMnO4—we find that they differ in composition by the abstraction of one equivalent of the metal. Such a relation in composition produced by oxidation is of frequent occurrence—for instance, K4Fe(CN)6 in oxidising gives K3Fe(CN)6; H2SO4 in oxidising gives persulphuric acid, HSO4, or H2S7O8; H2O forms HO or H2O2, &c.