Title: mass-transfer-controlled electrolyte rate constant
Long Title: IUPAC Gold Book - mass-transfer-controlled electrolyte rate constant
DOI: 10.1351/goldbook.M03755
Status: current

Definition
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.

Related Terms
- 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

Source
- PAC, 1985, 57, 1491. 'Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)' on page 1501 (https://doi.org/10.1351/pac198557101491)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/M03755/html
- json: https://goldbook.iupac.org/terms/view/M03755/json
- xml: https://goldbook.iupac.org/terms/view/M03755/xml

Citation: 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
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Accessed: 2026-05-09T21:50:26+00:00