Abstract
The ultraviolet spectra of solutions of
potassium nitrate in aqueous sulphuric acid have been studied. Three
absorptions, those due to the species NO3-, HNO3,
and NO2+, have been found. From this study a
semiquantitative picture has been developed of the distribution of the total
nitrate between these three species. It was found that in the sulphuric acid
concentration range 0-15% by weight, the dissolved nitrate existed as nitrate
ion and that from 15-70% sulphuric acid, nitrate ion, and molecular nitric acid
were present in comparable amounts. In the sulphuric acid concentration range
72-82% nitric acid accounted for the total dissolved nitrate and as the
sulphuric acid concentration was increased from 82-90% nitric acid was
converted to nitronium ion.
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14 articles.
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