I. V. Kuskov

The solubility of ozone in aqueous solutions of sulfuric, phosphoric, and perchloric acids

The solubility of ozone in pure water and aqueous solutions of sulfuric, phosphoric, and perchloric acids was determined at 20°C. An increase in the concentration of H3PO4 and HClO4 (to 14.8 and 9.5 M, respectively) caused a monotonic decrease in the solubility of ozone. The solubility of ozone in sulfuric acid was minimum at a 12 M concentration; the solubility then increased and, in 17.9 M H2SO4, reached almost the same value as in pure water. The ratio between the concentrations of O3 in solution and the gas phase was 0.276 in pure water, 0.122 in 12 M H2SO4, and 0.265 in 17.9 M H2SO4. The results obtained are compared with the available literature data.

The solubility of ozone and kinetics of its chemical reactions in aqueous solutions of sodium chloride

The solubility of ozone and the kinetics of its decomposition and interaction with chloride ions in a 1 M aqueous solution of NaCl at 20°C and pH 8.4–10.8 were studied. The ratio between the concentration of O3 in solution and the gas phase was found to be 0.16 at pH 8.4–9.8. The concentration of dissolved ozone decreased sharply as pH increased to 10.8 because of a substantial increase in the rate of its decomposition. It was observed for the first time that the interaction of O3 with Cl− in alkaline media resulted in the formation of ClO3− chlorate ions. The dependence of the rate of formation of ClO3− on pH was determined; its maximum value was found to be 9.6 × 10−6 mol l−1 min−1 at pH 10.0 and the concentration of ozone at the entrance of the reactor 30.0 g/m3. A spectrophotometric method for the determination of chlorate ions (concentrations 1 × 10−5−3 × 10−4 M) in aqueous solutions was suggested.

Interaction between ozone and the chloride ion in sulfuric acid solutions up to 6-M concentration

AbstractThe effect of sulfuric acid concentration on Cl2 evolution in the reaction between O3 and Cl− has been investigated. The catalytic effects of metal ions in this reaction have been studied as a function of solution acidity. The chlorine evolution rate increases markedly with increasing acid concentration. At acid concentrations below 4 mol/l, the most effective catalyst is Co2+. The catalytic activities of Fe3+ and Cu2+ peak at

Photometric determination of chlorine in a gas flow in the presence of ozone

C_{H_2 SO_4 }

The oxidation of chlorine ions under the joint action of ozone and permanganate ions

= 4.8 mol/l. In passing to highly acidic solutions (

Catalysis of the reaction of ozone with chloride ions by metal ions in an acidic medium

C_{H_2 SO_4 }