Solubility of Ozone in Aqueous Solutions of Oxalic Acid and Potassium and Sodium Nitrates: Determination of the Anion-Specific Parameter for the Oxalate Ion in a Model for the Solubility of Gases in Electrolyte Solutions

Resumo

The solubility of ozone in solutions of oxalic acid H₂C₂O₄ and potassium nitrate at concentrations up to 1 and 2 M, respectively, is studied at 25°C. The Sechenov constants for these electrolyte solutions are found: 0.081 ± 0.010 and 0.082 ± 0.004 M^–1, respectively. The anion-specific parameter in the Weisenberger–Schumpe gas solubility model for oxalate ion is determined: \({{h}_{{{{{\text{C}}}_{2}}{\text{O}}_{4}^{{2 - }}}}}\) = 0.1266 M^–1. A set of coefficients is determined using the experimental data from various sources to calculate the density of H₂C₂O₄ solutions as a function of temperature in the range of 5–100°C at solution concentrations up to the saturated concentration at a given temperature.