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A Raman Study of the Isomers and Dimer of Hydrogen Sulfite Ion

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Raman spectra of aqueous solutions of hydrogen sulfite ion (SHO3 -) were collected over temperatures of 275 to 340 K. The change in peak intensities with temperature was used to assign peaks to the hydrogen sulfite isomers. The HOSO2 - isomer has a peak at 1023 cm−1 and the HSO3 - isomer has a peak at 1052 cm−1. The relative strengths of the peaks were determined and used to measure the equilibrium quotients for hydrogen sulfite ion.

Q 1 = [HOSO2 -]/[HSO3 -]

Q 2 = [S2O5 2-]/SHO3 -]2

No evidence was found for a hydrogen sulfite dimer other than disulfite ion, S2O5 2-.

Keywords: Bisulfite ion; Disulfite ion; Isomer; Raman spectra

Document Type: Research Article


Affiliations: Lawrence Berkeley Laboratory, Energy and Environment Division, Berkeley, California 94720

Publication date: May 1, 1992

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