Hydrogen ion activities and species distribution in mixed metal sulfate aqueous systems | Zendy

Filippou Dimitrios | Zendy; Demopoulos George P. | Zendy; Papangelakis Vladimiros G. | Zendy

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Hydrogen ion activities and species distribution in mixed metal sulfate aqueous systems

Author(s) -

Filippou Dimitrios,

Demopoulos George P.,

Papangelakis Vladimiros G.

Publication year - 1995

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.690410117

Subject(s) - aqueous solution , sulfate , chemistry , hydrogen , inorganic chemistry , metal , hydrogen ion , distribution (mathematics) , ion , environmental chemistry , organic chemistry , mathematics , mathematical analysis

The activity of the hydrogen ion (H + ) is estimated in sulfuric acid aqueous solutions of concentrations 0.25 to 2.0 mol.L −1 at temperatures 298 to 373 K (25 to 100°C). This is done by following an existing “extended Debye‐Hückel” equation, which was originally developed only for the case of pure H 2 SO 4 solutions at ambient temperature. The same equation is applied for the evaluation of the activity of H + in mixed metal sulfate solutions, particularly for the aqueous system H 2 SO 4 ‐ZnSO 4 ‐FeSO 4 ‐Fe 2 (SO 4 ) 3 . The estimation of the activity of H + by this method requires the knowledge of the molality of free H + ions and the true ionic strength (in molal scale). Consequently, an algorithm is advanced for the calculation of species concentrations in such mixed solutions. Estimated p H values agree very well with experimentally measured ones.

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