A slightly modified version of Lotka’s
mechanism that gives
rise to sustained oscillations is shown to mimic observations of electrochemical
oscillations reported during the dissolution of iron from iron electrodes
in acidic media. The presentation of the modified mechanism includes
only familiar chemical species and, in comparison to other mechanisms
of chemical oscillators, is analyzed in a simple manner. Therefore,
this new mechanism is particularly well-suited to present to students
during introductory discussions on the topic of oscillating chemical
reactions.