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Correlation of osmotic coefficient data for ZnSO4(aq) at 25 degrees C by various thermodynamic models

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2003
Authors
Miladinović, Jelena
Ninković, Rozalija
Todorović, Milica
Jovanović, Vladislava M.
Article (Published version)
,
Springer
Metadata
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Abstract
The available literature data on the osmotic coefficient of ZnSO4(aq) at 25degreesC in the molality range from 0.1 to 4.3 mol-kg(-1) and new experimental data from 1.2 to 2.9 mol-kg(-1), at the same temperature, are presented. Selected values of the osmotic coefficient from all the data are analyzed using the Clegg-Pitzer-Brimblecombe model, the extended Pitzer model, and a semiempirical equation comprising a power series in molality added to the Debye-Huckel limiting law. The extended Pitzer equation and the Clegg-Pitzer-Brimblecombe equations give the best results in fitting the osmotic coefficient data. All three models are used to calculate ZnSO4 activity coefficients at 25degreesC in dilute solutions (<0.1 mol-kg(-1)) for comparison with published values.
Keywords:
Isopiestic measurements / Zinc sulfate / Osmotic coefficient / Activity coefficient / Extended Pitzer model / Clegg–Pitzer–Brimblecombe model / Semiemprical equation
Source:
Journal of Solution Chemistry, 2003, 32, 4, 371-383
Publisher:
  • Springer
Projects:
  • This work was supported by the Ministry for Science, Technology and Development, of the Republic of Serbia under Project No. 1891.

DOI: 10.1023/A:1023710022173

ISSN: 0095-9782

WoS: 000182849400006

Scopus: 2-s2.0-0347003388
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/3482
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