I. The Oxidation State of Argentic Salts in Acid Solution. II. The Mercury Sensitized Photoreaction Between Ammonia and Oxygen. III. The Photochemical Decomposition of Hydrogen Selenide

I. THE OXIDATION STATE OF ARGENTIC SALTS IN ACID SOLUTION The argentic salt produced in solution by oxidizing with ozone argentous nitrate dissolved in concentrated nitric acid at 0°C. is shown to contain the silver almost entirely in the bipositive form. One of the three independent methods used involves the determination of the magnetic moment of the argentic silver ion. A value of 1.98 Bohr magnetons is found for its magnetic moment. II. THE MERCURY SENSITIZED PHOTO-REACTION BETWEEN AMMONIA AND OXYGEN Experiments which were made in two different reaction vessels give evidence of a surface reaction. The contradictory results of two former pairs of investigators are discussed and the present results are shown to be in accord with both previous pieces of work. III. THE PHOTOCHEMICAL DECOMPOSITION OF HYDROGEN SELENIDE The results are given of a study of the photodecomposition of hydrogen selenide at a series of pressures from 8 to 60 mm. A unit quantum yield was found, constant over this pressure range. A mechanism for the decomposition is offered.