03755 IUPAC Gold Book - mass-transfer-controlled electrolyte rate constant 10.1351/goldbook.M03755 M03755 current 1 In controlled-potential coulometry and related techniques, the empirically evaluated constant of proportionality defined by the equation \[s_{\rm{B}}=- \frac{1}{c_{\rm{B}}}\ \frac{\mathrm{d}c_{\rm{B}}}{\mathrm{d}t}\] where \(c_{\rm{B}}\) is the bulk concentration of the substance B, and \(\frac{\rm{d}c_{\rm{B}}}{\rm{d}t}\) is the rate of change of that concentration, resulting from the consumption of B by reduction or oxidation at the working electrode. bulk concentration https://goldbook.iupac.org/terms/view/B00753 oxidation https://goldbook.iupac.org/terms/view/O04362 working electrode https://goldbook.iupac.org/terms/view/W06686 PAC, 1985, 57, 1491. 'Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)' on page 1501 (https://doi.org/10.1351/pac198557101491) https://goldbook.iupac.org/terms/view/M03755/html https://goldbook.iupac.org/terms/view/M03755/json https://goldbook.iupac.org/terms/view/M03755/plain Citation: 'mass-transfer-controlled electrolyte rate constant' 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.M03755 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. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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. 2026-05-09T21:49:54+00:00