 | Sodium Reaction Sodium metal is a Soft metal, Can be cut with a knife and its very reactive but its one step under Potassium. Sodium metal reacting with water producing hydrogen then igniting. Sodium + Water = Hydrogen + Sodium Hydroxide. 2Na+ + 2H2O + 2e− → H2 + 2NaOH P.S: Please do not use as much Sodium as i have. Use a little piece so that it does not ignite and blow up. Safety first. |
 | Elephant Toothpaste Here is a chemistry demo dubbed "Elephant Toothpaste". I like the controlled evolution of the foam coming from a 2 liter bottle better than from any other vessel. In a later video we'll show you how we got that 2-liter bottle to look more like a one liter bottle (notice the wrapper hanging loosely from the bottle). Technically speaking this is the catalytic and thermal decomposition of H2O2 to oxygen and water by iodide and heat evolution (boiling water). I want you to envision this as a molecular bubble wand. As the oxidation/decomposition is occurring oxygen is being formed and since it's a gas (at this temperature) it forms micro (possibly even nano) bubbles in the Dawn dishwashing liquid that has been added. Why are there so many? If you've never heard of Avogadros number, I'll briefly explain. There are 6.02 times 10 to the 23rd power atoms in an equivalent of every chemical. That's 602300000000000000000000 atoms. In this experiment I'd say we were at about 1/15 of that as we used about 10grams of iodide. The smoke you see is simply steam from boiling water. This reaction and the formation of water is exothermic (gives off heat), but the maximum temperature it can reach is 212F (100C). Oh well, enough splainin. I hope you enjoyed this video! |
 | H2O2 and MnO2, first experiment Our first experiment for the Hydrogenperoxide-Manganese(IV)oxide rocket |
 | Fire without a spark Lecture Demonstrator James Maynard, UW Madison, sprays ethanol onto highly toxic Chromium (VI) Oxide. Kids, don't try this one at home. |
 | Underwater Fireworks Professor Mark Wendt, UW Madison, explains and demonstrates "underwater fireworks." |
 | Elephant Toothpaste Hydrogen peroxide decomposing with catalyst |
 | Big thermite reactions (manganese oxide MnO, copper oxide Cu just cool |
 | Potassium Permanganate + Hydrogen Peroxide This is a video of the decomposition of potassium permanganate and hydrogen peroxide. 2KMnO4 + H202 = 2KOH + MnO2 +O2 |
 | Hydrogen Peroxide Decomposition Associate Lecturer Adam van Wynsberghe, UW Madison, demonstrates the role of a catalyst, manganese dioxide, in the decomposition of hydrogen peroxide into water and oxygen. |
 | Guncotton Lecture Demonstrator James Maynard, UW Madison, demonstrates "guncotton," cotton which has been nitrated. Guncotton was practically produced first in 1846, and was intented for heavy ordinance weapons, with some limited use continuing today. |
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