Abstract

1. The relative concentrations of NO2+ ions have been calculated for low concentrations of nitric acid (0.1–0.3 M), using internal standards. 2. A procedure is proposed for the calculation of NO2+ ion concentrations in sulfuric acid-nitric acid-water systems with high concentrations of HNO3 in the system, and values have been calculated for the equilibrium concentrations of NO2+ in solutions containing up to 6.8 M nitric acid. 3. A single curve has been plotted for the ionization of nitric acid in aqueous sulfuric acid solutions; the correctness of the scheme that has been adopted for the ionization of nitric acid has been verified.

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