I have found a gif photo on the internet and I am very curious what is happening there? What reaction is the reason for that?
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4$\begingroup$ I kinda like the GIF, but using dangerous, reactive reagents such as concentrated $\ce{H2O2}$ to perform a rather violent reaction without any safety glasses? Bad idea. $\endgroup$– Curt F.Commented Dec 29, 2015 at 13:51
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$\ce{KI}$ with $\ce{H2O2}$ with a tiny bit of dishwashing liquid. It is a rather violent redox reaction wherein $\ce{H2O2}$ is decomposed to $\ce{H2O}$ and $\ce{O2}$. You can actually see that $\ce{I2}$ is being formed by the brownish-yellowish color in the beginning of the reaction.
There is a lot of information about this reaction. I performed this reaction quite a few times myself for my students. It is a lot of fun. Some people call it making elephant toothpaste. :-)
