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Posted by bio_man   May 11, 2013   3730 views
http://www.youtube.com/watch?v=ritaljhhk7s#t=1m20s

Here's how the decomposition of mercury(II) thiocyanate as it's lit with a torch (skip to 1 minute, 20 seconds).
chemistry chemicals
Posted in Videos
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Mercury thiocyanate was formerly used in pyrotechnics causing an effect known as the Pharaoh's serpent or Pharaoh's snake. When the compound is in the presence of a strong enough heat source, a rapid exothermic reaction is started which produces a large mass of coiling serpent-like solid.
Posted on May 11, 2013 by savio
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