Elephant's Toothpaste Reaction — Hydrogen Peroxide & Potassium Iodide Spectacular Experiment

Watch a dramatic chemistry demo: the classic “elephant’s toothpaste” reaction captured by a contributor. Concentrated hydrogen peroxide decomposes rapidly when catalyzed by potassium iodide, releasing oxygen that creates a towering, fast-moving foam fountain. This spectacular visual shows how exciting and engaging chemistry can be — perfect for classrooms, STEM demos, and curious learners. What’s happening: potassium iodide acts as a catalyst to break H2O2 (hydrogen peroxide) into water and oxygen. The released oxygen gets trapped in soap to form dense foam, producing the iconic fountain effect. It’s a clear, memorable demonstration of catalysis, gas formation, and reaction kinetics. Safety note: this demonstration uses strong oxidizers and can produce heat. Do not attempt without proper safety gear, supervision, and appropriate concentrations and protocols. Like this clip? Subscribe for more science demos, explanations, and classroom-safe experiment ideas. Comment below if you want a step-by-step guide or a breakdown of the chemistry. #ElephantsToothpaste #ChemicalReaction #HydrogenPeroxide #PotassiumIodide #ScienceExperiment #ChemistryDemo #STEM #AmazingScience #Educational #Experiment