|nitrogen triiodide||molecular mass
Nitrogen triiodide, also called ammonium triiodide, is a very unstable explosive that's not really practical due to its tremendous instability and cost. When wet it is stable but when dry the touch of a feather can cause it to detonate. Wet nitrogen triiodide should be spread out as much as possible or numerous small piles made. When dry the nitrogen triiodide will not explode from its own weight if spread out, a single large pile will.
A controlled lab demo using a feather to cause detonation:
Nitrogen triiodide is formed when iodine atoms displace the hydrogen atoms in ammonia NH3 + I = NI3. This reaction occurs when iodine crystals, I2 are soaked in excess ammonium hydroxide. To begin, select a small beaker or even a disposable cup about 50-mL in capacity. This process may permanently stain any container so I suggest the cup. Add 2 g of iodine crystals to the beaker, crush them as much as possible with a stirring rod. Add 40 mL ammonium hydroxide to the beaker. After 2 hours the reaction should be complete. Pour the solution over a filter to collect the crystals, any excess can be rinsed out of the beaker with water. Put the crystals where you want them immediately because there only semblance of stability is when wet. Drying will take about 1 hour. You will need a graduated cylinder for measuring liquids.
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