2009年1月16日金曜日

How fireworks work


FIREWORKS

In the science experiment in our class we dealt with different colors produced by salts with the bunsen burners. Similar to our experiment we did in class fire works use salts to produce different colors. Heres a chart that shows the different colors produced and the compounds salts that show the different colors of the fireworks during and explosion.



Color Compound
red

strontium salts, lithium salts
lithium carbonate, Li2CO3 = red
strontium carbonate, SrCO3 = bright red



orange

calcium salts
calcium chloride, CaCl2


yellow

sodium salts
sodium chloride, NaCl


green

barium compounds + chlorine producer
barium chloride, BaCl2


blue

copper compounds + chlorine producer
copper(I) chloride, CuCl


purple
mixture of strontium (red) and
copper (blue) compounds

silver burning aluminum, titanium, or magnesium

What chemical reaction Occurs?

Chemical reaction occurs in the while seeing the fireworks and the sound of the explosion. The chemical reaction that occurs is oxidations and reductions, which take places when the fireworks explode. The Oxiders produce oxygen gas, which helps by helping to burn the mixtures, which have reducing agents, and by stimulating the atoms of the different lights releasing different types of compounds.

Heres url showing the different lights of fireworks.


http://jp.youtube.com/watch?v=1VySlPcbe24&feature=related

Do you know how fireworks are made?


While making fireworks the metal salts are taken and made in to shape of stars. These salts are put in to a type of dough about 3-4 diameters with the star shape. In these star shapes there it consists of oxidizing agent, reducing agent, and colors (metal salt). When the fireworks explode the starts that are in the fireworks are what produces the sound and the different lights. However fireworks can be dangerous in factories making fireworks sometime there can be explosions that destroys the whole factory. This url will show what it can do http://jp.youtube.com/watch?v=nb8sxJbRakU&feature=related.



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