by Nicole Ayers, 8th Grade Math & Science
We’ve been on a mission to make the kind of “elephant toothpaste” that would make Mark Rober proud. It’s theoretically a “simple” chemical reaction where hydrogen peroxide decomposes into water and oxygen gas. We’ve found, however, that the concentration of hydrogen peroxide, type of catalyst, and geometry of the reaction vessel all play an important role in the “wow” factor of this scientific experiment.
Our first attempts were rather “meh”…
So we asked the Science Club to help us figure out the secret to making a super cool Elephant Toothpaste reaction. The Science Club helped make some improvements by using a different catalyst - sodium iodide instead of yeast. It was better than “meh” but not quite “wow”…
We knew a key factor would be finding more concentrated hydrogen peroxide, so we ordered the most concentrated solution we could find without crossing over into a hazardous materials classification. We want to have fun exploring science, but safety is our number one priority!
The reaction started off slowly at first, then bubbles of oxygen trapped in dish soap started pouring out everywhere. We could also see steam billowing into the air, evidence of an exothermic (heat producing) reaction. We have some ideas about how to continue improving this demonstration, but at least we got a bit of a “wow” for now!