Monday, November 14, 2011

Chemical Reactions!

1. http://www.youtube.com/watch?v=hVK9Om4wzBM
Once bromine was put into the alcoholic substance, the alcohol had to be shaken a little bit, in order for the bromine to dissolve better. Firstly, the white bromine started dissolving into the alcohol turining it yellow. The, towards the end, it seemed as though the bromine started burning, because a very powerful, bright orange gas was released. It looked quite toxic. Finally, once the chemical reaction was over, only a very light yellow liquid was left behind. We know a chemical reaction has taken place, because a gas was released and there was a significant color change.

2. http://www.youtube.com/watch?v=8ypUVpwgcAA&feature=related
A small piece of lithium was put into water. The moment lithium touched the water, it turned into a flame that quickly started moving across the water's surface. Before it started burning, though, the lithium also sizzled severely. However, the flame went away quickly, as well. A smoke was, obviously, released. We know that a chemical reaction has taken place, because a the metal combusted.

3. http://www.youtube.com/watch?v=896vJj6eWYw&feature=related
This was a chemical reaction between ceasium and water. Just like all alkali metals, ceasium had a severe reaction once it got in touch with water. It combusted, and looked much like a firework. The actual combustion was quite short, but the stregnth of the chemical reaction was shown by the amount of smoke that was produced. The color of the "firework" was quite bright orange.

4. http://www.youtube.com/watch?v=qRmNPKVEGeQ&NR=1
This chemical reaction was between potassium and water. The potassium reacted in a similar way to lithium, except the actual flame lasted much longer. What I found quite interesting was the fact that that the flame died down VERY quickly, and towards the end of the video, it seems like the potassium makes a popping sound, and explodes out of the water.

5. http://www.youtube.com/watch?v=vJslbQiYrYY&NR=1
The next video shows sodium in water, and, in my opinion, this is one of the coolest reactions! Firstly, the sodium is dropped into the water, and it automatically creates a yellow flame that is floating in the water. Then, once you start thinking that the flame might start dying down, a big combustion happens, that sends the water flying everywhere! I believe that the sodium was able to break the container, as well, if just a tiny bit more of it was added.

6. http://www.youtube.com/watch?v=_Pk6s1MbszA&feature=related
In this experiment, a gummy bear is added to sodium chlorate. Once the gummy bear was dropped into the test tube filled with sodium chlorate, the tube started fuming, and it alomst appeared as though it was glowing! You can deffinetely tell a chemical reaction took place, because the combustion was obvious. At first, the flames and the glowing happened only at the bottom of the tube, but it rapidly advanced to the whole tube, as well.

7. http://www.youtube.com/watch?v=zrNA8-eipGE&feature=related
Finally, this is a really fun experiment, that looks super interesting! So, the person put water inside a cup, and hooked a light that sent electricity through the water. The whole cup started glowing! But, to make it more interesting, the person added a blue food dye and stirred it with the water. This created a really cool turquoise color that glowed just like a real lightbulb!

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