RAMAN-SPECTROSCOPIC STUDY OF NITRONIUM ION FORMATION IN MIXTURES OF NITRIC-ACID, SULFURIC-ACID AND WATER

Authors
EDWARDS HGM TURNER JMC FAWCETT V
Citation
Hgm. Edwards et al., RAMAN-SPECTROSCOPIC STUDY OF NITRONIUM ION FORMATION IN MIXTURES OF NITRIC-ACID, SULFURIC-ACID AND WATER, Journal of the Chemical Society. Faraday transactions, 91(10), 1995, pp. 1439-1443
Citations number
26
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Journal title
Journal of the Chemical Society. Faraday transactions → ACNP
ISSN journal
09565000
Volume
91
Issue
10
Year of publication
1995
Pages
1439 - 1443
Database
ISI
SICI code
0956-5000(1995)91:10<1439:RSONIF>2.0.ZU;2-W
Abstract
Quantitative Raman spectroscopic measurements of the intensity of the v(NO) symmetric stretching band of NO2+ in aqueous solutions of nitric and sulfuric acid mixtures have been carried out over the temperature range 293-313 K. From the spectroscopic data it was found that the NO 2+ species concentration decreased with an increase in temperature. Eq uilibrium constants for the reaction HNO3 + 2H(2)SO(4) reversible arro w NO2+ + H3O+ + 2HSO(4)(-) were determined at 293 and 313 K and the av erage enthalpy of NO2+ formation was found to be Delta H = -25 + 5 kJ mol(-1).