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Pharaoh's snakes or Pharaoh's serpents are a type of small firework in which a lighted tablet exudes smoke and ash in a growing column which resembles a snake.
This is an extremely simple firework demonstration. All you need to do is ignite a small pile of mercury(II) thiocyanate, Hg(SCN) Mercury thiocyanate is an insoluble white solid which can be purchased as a reagent or can be obtained as a precipitate by reacting mercury(II) chloride or mercury(II) nitrate with potassium thiocyanate.
let the law suits commence! Hahahaha.... It would be wise for this experiment be utilized in a well ventilated area with proper personal protection equipment for all observers as well as the one conducting it. Great point voidhawk! Safety first everyone!!!
originally posted by: VoidHawk
Come along children, inhale that mercury, it'll be good for you.