WARNING! This experiment is dangerous! You should NOT perform this at home. ONLY carry out this experiment, if you are a trained chemist, and you understand local safety and legal requirements, which are required to perform such experiments
- Chlorine gas production is needed for this experiment. For the synthesis of chlorine gas use a round-bottom flask with about 5 g of potassium permanganate inside and dropping funnel filled with hydrochloric acid. Dropwise add hydrochloric acid to potassium permanganate to produce chlorine gas.
- Place the silicon powder in a porcelain boat in a glass tube.
- Connect one end of the tube with a chlorine gas feed and another one with the product collector. Produced chlorine gas from the round-bottom flask should pass through sulfuric acid for drying. Silicon tetrachloride may be collected in a cooling receiving vessel. For the absorption of chlorine, the vessel should be connected with the vessels filled with concentrated sodium hydroxide solution.
- When chlorine is being produced with a uniform rate and fills the apparatus, heat silicon with a burner.
- After 0.5 - 1 ml of product has been collected, finish heating of the tube and cool it in a steam of chlorine gas.