Simple and Automated Coulometric Titration of Acid Using Nonisolated Electrodes
-
Thomas S. Kuntzleman [1] ; Joshua B. Kenney [1] ; Scott Hasbrouck [1] ; Michael J. Collins [2] ; John R. Amend [3]
-
[1] Spring Arbor University
Spring Arbor University
Township of Spring Arbor, Estados Unidos
-
[2] Viterbo University
Viterbo University
City of La Crosse, Estados Unidos
-
[3] MicroLab, Montana, United States
-
- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 88, Nº 11, 2011, págs. 1565-1568
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
-
Resumen
Coulometric titrations involve the quantification of analyte by measurements of current and time. In most coulometric titrations, the anode and cathode are placed in isolated cells that are connected by a salt bridge. By contrast, the experiments described here involve coulometric titrations (of acidic protons in solution) using a silver anode and graphite cathode placed in the same reaction vessel. The chemistry of the electrode reaction generating the reactant is described. This use of non-isolated electrodes allows for simplified experimental procedures (some of which are described) and faster titration times. Additional streamlining of the experiment is achieved by the use of MicroLab data acquisition instrumentation. This laboratory is appropriate for an analytical course.
