Twinkling star: A simple chemical oscillator

Chemical oscillations occur in time and space when chemical reaction systems with non-linear kinetics are coupled to diffusion, sedimentation, dissolution, and/or adsorption processes. Having two or more sets of steady state conditions is the unique characterization of these non-linear kinetic systems. In the past three decades more than a thousand chemical oscillation systems have been observed either accidentally or after a clever design and systematic search. Larger number of steady states far from each other and with short stability periods may result in chaotic behavior which can be considered as superposition of two or more oscillations [۱,۲]In this work, a new simple oscillator based on the dissolution rates of solid NaOH coupled to the diffusion of the dissolved species and displacement of the acid-base equilibrium of an indicator, affected also by the change in the ionic strength of the solution due to the dissolution of NaOH. This oscillation appears, thus, as a twinkling star around the NaOH pill.

کلیدواژه ها:

Chemical oscillation ، Reaction-diffusion ، RGB Analysis