{"term":{"id":"06024","doi":"10.1351\/goldbook.S06024","code":"S06024","status":"current","longtitle":"IUPAC Gold Book - stoichiometric mean molal (practical activity coefficient), in electrochemistry","title":"stoichiometric mean molal","version":"2.3.3","lastupdated":"2014-02-24","definitions":[{"id":"1","text":"The practical activity coefficient of electrolyte B is given by γ ± = a ± ν + ν + ν- ν- m B m 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. ","contexts":{"in":["electrochemistry"]},"links":[{"title":"coefficient","type":"goldify","url":"https:\/\/goldbook.iupac.org\/terms\/view\/C01124"},{"title":"molality","type":"internal","url":"https:\/\/goldbook.iupac.org\/terms\/view\/M03970"}],"math":[{"alttext":"γ ± = a ± ν + ν + ν- ν- m B m ","latex":"\\gamma _{\\pm }=\\frac{a_{\\pm }}{\\sqrt{\\nu _{\\text{+}}^{\\nu _{\\text{+}}}\\ \\nu _{\\text{-}}^{\\nu _{\\text{-}}}}\\ \\frac{m_{\\text{B}}}{m^{\\text{+}}}}"},{"alttext":"a±","latex":"a_{\\pm }"},{"alttext":"m B","latex":"m_{\\text{B}}"},{"alttext":"m + = 1 mol kg-1","latex":"m^{\\text{+}} = 1\\ \\text{mol kg}^{-1}"},{"alttext":"ν +","latex":"\\nu _{\\text{+}}"},{"alttext":"ν-","latex":"\\nu _{\\unicode{x2013}}"},{"alttext":"ν = ν + + ν-","latex":"\\nu = \\nu _{\\text{+}}+\\nu _{\\text{-}}"}],"sources":["PAC, 1974, 37, 499. 'Electrochemical nomenclature' on page 510 (https:\/\/doi.org\/10.1351\/pac197437040499)"]}],"links":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/S06024\/html","json":"https:\/\/goldbook.iupac.org\/terms\/view\/S06024\/json","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/S06024\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/S06024\/plain","pdf":"https:\/\/goldbook.iupac.org\/terms\/view\/S06024\/pdf"},"citeas":"IUPAC. Compendium of Chemical Terminology, 2nd ed. (the \"Gold Book\"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https:\/\/doi.org\/10.1351\/goldbook.","license":"Licensed under Creative Commons Attribution-NoDerivatives (CC BY-NC-ND) 4.0 International (https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/)","collection_reuse":"For parties interested in reusing the entire IUPAC Gold Book please contact IUPAC here https:\/\/www.cognitoforms.com\/IUPAC1\/ContactInformationForm","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2023-06-06T05:52:33+00:00"}}