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stoichiometric mean molal (practical activity coefficient)

in electrochemistry
The practical activity coefficient of electrolyte B is given by
γ ± = a ± ν + ν + ν − ν − m B m +
where a ± is the mean activity of B in solution, m B is the molality of B, m + = 1 mol kg −1, ν + is the number of cations and ν − the number of anions in the chosen group B which is taken as the electrolyte.
ν = ν + + ν −
Source:
PAC, 1974, 37, 499 (Electrochemical nomenclature) on page 510
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.S06024.
Original PDF version: http://www.iupac.org/goldbook/S06024.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
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