Experimental analysis investigates gas products from nitric acid acting on copper, suggesting key outcomes in chemistry.
Vibrational spectroscopy was utilized to investigate the infrared-active, nitrogen-containing gases generated by the historic Ira Remsen reaction, which exploits the action of nitric acid on copper metal. Effective integrated absorption cross sections derived from spectral databases were employed to quantify yields of the major gaseous products. Gases observed include NO2 (and its dimer, N2O4), NO, N2O, cis- and trans-HONO, HNO3 and ClNO, arising from chloride contamination. It was demonstrated that NO2 , N2O4 and NO are the dominant gas phase products of the reactions in concentrated and dilute nitric acid, respectively. The experiment described here for the upper-division chemistry laboratory provides a unique context through which to introduce vibrational spectroscopy of diatomic and polyatomic gases and their quantification in mixtures.
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Sytsma et al. (2018) studied this question.
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