Sulfuric acid has attracted the attention of a considerable number of investigators interested in the properties of non-aqueous solvents. Pure 100% H&04 is fairly easily prepared, is a liquid over a very wide temperature range (10.5'to 332') and its physical properties, with the single exception of its very high viscosity, l are such as to present no serious experimental obstacles to its investigation. The first systematic study of this solvent was undertaken by ...