Trigonometric functions in modelling periodic phenomena in chemistry

As part of a research I want to model a periodic phenomenon in chemistry through trigonometry and calculus. Does anyone know anything that can be modelled with trig in chemistry (very preferably) or other areas aside from common ones such as lunar cycle, daylight, seasons, etc?

Any help is really really appreciated!

Reply 1

lordaxil

The Belousov–Zhabotinsky reaction is a well-known oscillatory chemical process, involving repeated oxidation/reduction of coloured/colourless ions. The original reaction involved cerium, but there is a simpler version described here using bromine.
https://edu.rsc.org/resources/a-simple-oscillating-reaction/753.article
The reaction oscillates with a time period of about 20 seconds. You could measure the colour change using a spectrometer, or even better, if you have the equipment, try to measure the electrode potential of solution (relative to a reference electrode).
The reaction involves potentially harmful chemicals, so do this at your own risk, and follow all health & safety guidance given in the web link above.