Ignite the fireworks string with a match and ignite the black powder, and a strong chemical reaction occurs immediately; Charcoal and sulfur react with potassium nitrate, releasing a lot of heat and producing many gases-nitrogen and carbon dioxide. At this time, the volume of gunpowder soared by 1000 times, and the tightly wrapped papyrus paper layer outside would "bang!" With a loud noise, firecrackers will also make a sound.
The main component of traditional fireworks and firecrackers is black powder, which contains sulfur (S), charcoal (C) and potassium nitrate (KNO3). The reaction equation is 2KNO3+3C+S=K2S+N2+3CO2. Some fireworks and firecrackers also contain potassium chlorate KClO? And potassium perchlorate KClO4. In order to produce brilliant colors and flashing effects, some fireworks add metal powders such as magnesium, aluminum and antimony and inorganic salts.
Extended data:
After the fireworks are lit, charcoal powder, sulfur powder and metal powder will burn rapidly under the action of oxidant, producing harmful gases such as carbon, nitrogen and sulfur, metal oxide dust and paper scraps and other pollutants, causing air pollution.
At the same time, the huge noise generated by fireworks is also easy to cause noise pollution. Therefore, in daily life, we should reduce or not set off fireworks to maintain social order and protect the ecological environment.
China-Chemistry in Fireworks.
Baidu encyclopedia-firecrackers