{"term":{"id":"15361","title":"solvent mole fraction","longtitle":"IUPAC Gold Book - solvent mole fraction","doi":"10.1351\/goldbook.15361","code":"15361","status":"current","also defines":"<em>also defines<\/em>: solvent mass fraction","definitions":[{"id":1,"text":"Mole or mass fraction of a solvent in a solution containing \\(s\\) solute constituents (\\(i = 1, 2, \\ldots, s\\)) and \\(p\\) solvent constituents (\\(i = s + 1, s + 2, \\ldots, p\\)). For a solvent \\(\\ce{A}\\), \\[x_{{\\rm{v}},{\\ce{A}}} = x_{\\ce{A}}\/\\sum \\limits_{i=s+1}^{p} x_{i}\\] where \\[\\sum \\limits_{i=1}^{p} x_{i} = \\sum \\limits_{i=1}^{s} x_{i} + \\sum \\limits_{i=s+1}^{p} x_{i} = 1\\] and analogously for \\(w_{{\\rm{v}},{\\ce{A}}}\\), where the first and last summations are over all solvent constituents.","links":[{"term":"Jänecke coordinates","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/15373"},{"term":"Mole","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/15376"},{"term":"constituents","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/16269"}],"sources":["PAC, 2008, 80, 233. 'Glossary of terms related to solubility (IUPAC Recommendations 2008)' on page 266 (https:\/\/doi.org\/10.1351\/pac200880020233)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/15361\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/15361\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/15361\/plain"},"citation":"Citation: 'solvent mole fraction' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.15361","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","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":"2026-07-25T22:30:07+00:00"}}