Marine Science Faculty Publications

Ultraviolet Spectroscopic Study of Ferric Equilibria at High Chloride Concentrations

Document Type

Article

Publication Date

1981

Keywords

Hydrolysis, ferric chloride, ferric hydroxide, UV spectroscopy, complexes, ion pairs

Digital Object Identifier (DOI)

https://doi.org/10.1007/BF00652780

Abstract

The equilibria among the species Fe3+, FeCl2+, FeCl2 +, FeOH2+ and Fe(OH)2 + have been examined by ultraviolet absorption spectroscopy. Our results indicate that previous workers have generally overestimated the stability constant of FeCl2+ and that the association of Fe3+ and Cl− is predominantly inner sphere. The formation constant of FeOH2+ obtained in 0.68 m NaCl is in good agreement with our earlier results obtained in 0.68 m NaClO4. Our results indicate that formation of FeOHCl+ is much less significant than has been previously reported. Molar absorptivities for the species Fe3+, FeCl2+, FeCl2 + and FeOH2+ are reported for wavelengths between 220 and 400 nanometers.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Journal of Solution Chemistry, v. 10, p. 51-67

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