A Raman spectroscopic study of the equilibria in aqueous solutions of Hg(II) chloride

Author:

Bentham Patrice B.,Romak Cynthia G.,Shurvell Herbert F.

Abstract

The techniques of factor analysis (principal component analysis) and band contour resolution have been applied to Raman spectra obtained from seven aqueous solutions of HgCl2 with various amounts of HCl added to increase the chloride to mercury ratio. The digitized spectra of the Hg—Cl stretching region (200–380 cm−1) were subjected to baseline fitting and removal, and normalization using the v2 band of ClO4 (380–530 cm−1) as an internal intensity standard. Factor analysis indicated the presence of three scattering components in the Hg—Cl stretching band envelope. Band resolution gave the positions of peaks assigned to HgCl2, HgCl3, and HgCl42− at 320, 290, and 269 cm−1, respectively. Approximate values for equilibrium constants for the equilibria present in the system have been calculated from the resolved band areas.

Publisher

Canadian Science Publishing

Subject

Organic Chemistry,General Chemistry,Catalysis

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