
TY  - JOUR
A1  - Bayliss, NS 
A1  - Dingle, R 
A1  - Watts, DW 
A1  - Wilkie, RJ 
T1  - The Spectrophotometry of Sodium Nitrite Solutions in Aqueous Sulphuric and Perchloric Acids and the Equilibrium between Nitrosonium Ion and Nitrous Acid
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1963
VL  - 16
IS  - 6
SP  - 933
EP  - 942
KW  - 
UR  - https://doi.org/10.1071/CH9630933 
N2  - The spectra of solutions of sodium nitrite in aqueous solutions of sulphuric and perchloric acids have been measured at a number of temperatures, and from these spectra the concentrations of the species HNO2 and NO+ have been calculated over the acid-concentration ranges 0-100% sulphuric acid (by wt.) and 0-72% perchloric acid (by wt.). The changes due to temperature were found to be less than the experimental error in the determination of the concentrations of nitrous acid and nitrosonium ion.   The equilibria of importance in such systems are discussed and equilibrium constants have been calculated for the reactions   H2SO4 + HNO2 <=>  H2O + NO+ + HSO4-  and     HClO4 + HNO2 H2O + NO+ + ClO4-     Attempts have been made to correlate the determined values for the concentration of nitrous acid and nitrosonium ion with the acidity functions J0, C0, and Hr for both solvent systems.   The nitroacidium ion (H2NO2+) in these systems is found to be less important than previously thought.' 
ER  -

