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Aqueous Solubilities, Solubility Products and Standard Oxidation‐Reduction Potentials of the Metal Sulfides
Abstract
Available thermodynamic data, incorporating a new free energy of formation for aqueous S 2− of 111 (±2) kJ/mol at 25°C, indicate that solubility products of the insoluble metal sulfide salts are several orders of magnitude smaller than previously considered. Thermodynamic characterization for a variety of soluble and insoluble aqueous metal sulfide systems is reported. Trends in the aqueous solubilities of the alkali salts solubilities are compared and discussed. New aqueous solubility products, K sp , and standard redox potentials, E 0 , for over forty metal sulfides are determined. The new values of p K sp and E 0 at 25°C include: Ag 2 S ‐ orthorhombic : 53.6 , − 0.786 V , and HgS ‐ red : 56.4 , − 0.816 V . Significant free S 2− occurs only in extremely alkaline media. The suitability of Δ G f 0 ( HS − ) , rather than Δ G f 0 ( S 2 − ) , based solubility products and redox potentials is discussed and these alternate values determined.
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Cited by
Critical Review of Pd-Based Catalytic Treatment of Priority Contaminants in Water
Chaplin, B. P., Reinhard, M., Schneider, W. F., Schüth, C., Shapley, J. R., Strathmann, T. J., & Werth, C. J. (2012) · Environmental Science & Technology · doi:10.1021/es204087q · Cited by 458
Pushie, M. J., Cotelesage, J. J., & George, G. N. (2014) · Metallomics · doi:10.1039/c3mt00177f · Cited by 55
Metadata
- Authors
- Licht, S.
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 1988-12-01
- Volume
- 135
- Issue
- 12
- Pages
- 2971-2975
- ISSN
- 0013-4651 (ISSN-L)
- 1945-7111
- OpenAlex
- W2017907256
- Cited by
- 175
- References
- 0
- FWCI
- 3.59
- Type
- journal article
- Language
- en
- Open access
- closed
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- Licht, S. (1988). Aqueous Solubilities, Solubility Products and Standard Oxidation‐Reduction Potentials of the Metal Sulfides. Journal of The Electrochemical Society. https://doi.org/10.1149/1.2095471
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