The Pharoah's Serpent -- Mercury Thiocyanate


(YouTube Link)


The Pharaoh's Serpent is a traditional pyrotechnic and chemical display in which mercury thiocyanate is set on fire, producing what looks like a very rapidly growing vine. It has since fallen out of favor due to the toxicity of mercury, but sodium bicarbonate produces a similar effect. The video above is a demonstration of this visually stunning chemical reaction.

via Urlesque

Man, that video could have been about 2 minutes shorter. Did we really need to see the person scoop all that out?

That said, this reminds me of my childhood around the 4th of July. I'm guessing the toxicity of that is why I get so antsy about overlong videos.
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Well, I see you got those snakes. But where's the good stuff man? No black cats, Roman candles or screaming meemies? You got no lady fingers, fuzz buttles, snicker bombs, church burners, finger blasters, gut busters, zippity do das, crap flappers? No whistling bungholes spleen splitters, whisker biscuits,
honkey lighters, Hüsker Düs and don'ts. Cherry bombs, nipsy dazers, with or without the scooter stick? Or one single whistling kitty-chaser?
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Here are instructions for making Sodium Bicarb snakes. Looks like they aren't quite as awesome as the old, toxic ones.

http://chemistry.about.com/od/chemistryhowtoguide/a/blacksnakes.htm

We used to make a big pile of the old ones and light them all at once. With enough tablets, you could crack a sidewalk. God knows what the fumes were doing to us.
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