Summary
With a chemist, Mark pushes the elephant-toothpaste reaction to its extreme ('devil's toothpaste') for a huge, fast eruption. It's a vivid look at how reaction speed changes an outcome.
Viewer safety
An extra-strong, extremely fast foaming reaction; loud and forceful. Trained-adults-only demo. Made for a general YouTube audience — an occasional mild or bleeped word can slip in, so preview if your classroom bar is strict.
Our rating is a quick teacher-to-teacher guide — preview before showing.
Teaching resources
Discussion questions
Talk about it
A stronger mixture reacts much faster, releasing gas and heat almost instantly. Reaction speed depends on the ingredients and their concentration.
- What made this reaction so much faster and bigger than regular elephant toothpaste?
- Why does a faster reaction look more like an explosion?
- Why must reactions like this be done only by trained adults with safety gear?
Quick work-a-long
Vocabulary: concentration, reaction rate, gas, safety.
Try it: Compare warm vs. cold water dissolving a fizzing tablet. Which fizzes faster? What does that say about reaction speed?