A vibrational-spectroscopic study of the SO2?H2O system

The chemical reaction equilibrium constant and standard molar enthalpy change for the reaction : a spectroscopic and calorimetric investigation

“…When sodium pyrosulfite is added to pure water, five additional peaks are detected in the wave number region from (800 to 1400) cm À1 (cf. Davis and Chatterjee [17]) (see figure 1). According to Lambert-BeerÕs law, the peak area (or the sum of peak areas) corresponding to a certain species is proportional to the molarity of that species.…”

Inhibition of Browning by Sulfites

“…Sulfites are salts of sulfurous acid, the existence of which has been questioned from experimental evidence (Davis and Chatterjee, 1975) and on thermodynamic grounds (Guthrie, 1979). It is unlikely that significant concentrations of H 2 S0 3 exist in solution; dissolved sulfur dioxide is best regarded as S02.H20 in which any interaction between S02 and H 2 0 is very weak and undetectable spectroscopically.…”

Nanostructure Directed Detection of Acidic SO2and Its Transformation to Basic Character: Suggested Transient Formation of SO3−, Impedance by Xylene

“…It remains to explain the rise in resistance observed in Figures 4-9. It is suggested that this rise in (3,4) As this conversion forms the moderately strong base SO 3 − which can contribute an electron as SO 3 desorbs from the PS surface, it leads to an increase in resistance. We thus suggest that this process is similar to but distinct from the mechanism outlined in Equations 1 and 2 and postulated previously 17,18 for the interaction of NO with n-type doped SnO 2 thin films and MO x 19 nanostructured metal oxide island sites on p-type PS.…”

“…In this study we demonstrate the apparent conversion of SO 2 , a known Lewis acid, to a basic analyte. We will suggest that this process revealed through the IHSAB concept, involves the formation of the transient SO 3 − through interaction with surface O − and the release of an electron.…”

“…SO 2 , a contaminant in diesel and natural gas engine exhaust and flaring, reacts with other chemicals to form particulate pollution. 1,2 Of equal importance is the interaction of SO 2 with water which both IR and Raman spectroscopy demonstrate leads to the formation of the hydrogen sulfite ion, HSO 3 − . 3 These processes can result in damage to the lungs and cause respiratory illness, heart conditions, and premature death.…”