I find it ironic that an article titled “chemical reactions” actually had demonstrations that were not technically chemical reactions. I suppose “Cool things that have to do with chemistry” doesn’t have the same ring to it.
(I’ll be going in reverse order, click here to see the original article)
- This one was a chemical reaction, the constant changing of color was due to the varying levels of the compounds in the solution. The equation summarizing this would be IO3− + 2H2O2 + CH2(COOH)2 + H+ → ICH(COOH)2 + 2O2 + 3H2O. This is a complex redox reaction.
- The ignition of the thermite is a reaction. Fe2O3 + 2Al → 2Fe + Al2O3 + heat and light. It is a single replacement reaction, and the Iron is reduced. However, the reaction with the liquid nitrogen was just a display to if the temperatures canceled out, rather than a chemical reaction.
- This is not a reaction, a change in the state of matter is not a chemical reaction. If the helium was heated, it would still be helium
- Once again, not a reaction, because the Sulfur hexaflouride’s chemical makeup remains the same, despite its zany effects on human vocal chords.
- Just because a compound is absorbent, doesn’t mean there is a chemical change. It is a little like an aqueous solution. The water remained water throughout the video.
- This one was tricky, because the sodium acetate dissociated into the water solution. Therefore, no chemical reaction took place.
- Not a reaction, the demonstration only took advantage of diamagnetism, a physical property.
- This was a decomposition reaction. Oxygen gas was released and oxidized. 2KClO3(heat) → 2KCl + 3O2
- This was obviously a reaction. The magnesium reacted with the oxygen in the carbon dioxide. In the combustion reaction, the magnesium was oxidized. 2Mg + CO2 → 2MgO + C
- This demonstration consisted two reactions. The first was with the sodium and water. It was a redox reaction, and the sodium was oxidized. 2Na + 2H2O → 2NaOH + H2 The heat from the first reaction triggered the second reaction with the sodium and chloride. The second one was a combination reaction. 2Na + Cl2 → 2NaCl
Personally, my favorite reaction was with the Potassium chlorate and the gummy bear (#8). I felt a combination of dread and amusement as I watched the gummy bear’s demise in the merciless inferno of chemical doom.
- Featured image: http://www.automation-drive.com/experiments
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