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The adsorption isotherms of some long-chain electrolytes (dodecylammonium chloride, dodecyl pyridiniuin bromide and sodium dodecyl sulphate) from their aqueous solutions on to polar and non-polar adsorbents (alumina, titanium oxide, barium sulphate, calcium fluoride and carbon black) have been determined. In these the effects of adding simple salt and of pH in the liquid phase have been especially examined. The adsorption attains, in almost all cases, saturation at an equilibrium concentration which approximately coincides with the critical concentration for the micelle formation of the long-chain electrolytes. It is suggested that the adsorption on the polar solids is composed of the superposition of the adsorption due to the ionized (polar) group and that due to the hydrocarbon (non-polar) group of the electrolyte.

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The electrical conductivity, the interaction with pinacyanol iodide, the degree of hydrolysis, and solubilization power for benzene have been measured for sodium oleate and elaidate. The conductivity behavior of these salts is consistent with the experimental result for hydrolysis and the latter result is also consistent with that of solubilization measurement. The result of dielectric polarization is also compatible with other results. All these experimental results show that sodium elaidate has a slightly greater tendency towards micelle formation than sodium oleate.

It has been demonstrated that the isomerisation of maleic acid into fumaric acid in aqueous solution is accerelated by the presence of molecular oxygen, platinum black, palladium black, and various paramagnetic ions, where the isomerisation being probably effectuated by the non-homogeneous magnetic fields of the catalysts in the collision. The isomerisation of maleic acid to fumaric acid in aqueous solution has been kinetically studied both in the presence of paramagnetic oxygen molecules and in the presence of diamagnetic nitrogen molecules, and the energy of activation of the reaction has been calculated. The lower energy of activation in the reaction with oxygen accounts for the catalytic action of the oxygen molecules.