Fantastic Four Color Oscillator

Oscillating redox reaction changes from green to blue to purple to red in a seesaw battle between Ce(IV) and Fe(II) ions. This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers - ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting.