The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 19
(2014) pp 333-337
Simultaneous Introduction of the Henderson-Hasselbalch Equation and Proton-Coupled Electron Transfer: An Undergraduate Laboratory Experiment
Anwesha Jana†, Debarati Roy Chowdhury†, Archana Singh*,‡, and Amit Paul*,†
†Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal, MP, 462066, India, firstname.lastname@example.org; ‡Advanced Materials and Processes Research Institute (AMPRI), Bhopal, MP, 462064, India, email@example.com
Published: 20 November 2014
Abstract. The Henderson-Hasselbalch equation has received immense attention in the chemistry curriculum because of its role in teaching acid-base equilibrium. On the other hand, proton-coupled electron transfer is an important elementary step in which protons and electrons are transferred simultaneously or in a stepwise manner. Proton-coupled electron transfer plays a pivotal role in biology and energy related research. Immense interest for proton-coupled electron transfer in the current era provoked us to include this important concept at the undergraduate teaching curriculum. Herein, we present a simple undergraduate laboratory experiment based on phenol oxidation over a range of pH, utilizing the technique of cyclic voltammetry for simultaneous illustration of the Henderson-Hasselbalch equation and proton-coupled electron transfer.
Key Words: Laboratories and Demonstrations; electrochemistry; Henderson-Hasselbalch Equation; proton-coupled electron transfer; cyclic voltammetry; pH; pKa
(*) Corresponding author. (E-mail: firstname.lastname@example.org)
Instruction notes are available (56 KB).