In the airbag, secondary pitants such as potassium treat (KNO3) and silicon dioxide (SiO2) are also used, along with the sodium azide (NaN3) (Los Alamos, 2004). A mixture of sodium azide, potassium nitrate and silicon dioxide is ignited in the gas generator by an electrical impulse. This liberates a volume of nitrogen gas (N2), which speedily fills the airbag in the reply:
The other byproduct of this reaction is sodium metal, which is unstable and can undergo an explosive reaction with body of water at room temperature. It reacts with the potassium nitrate to generate spare nitrogen for the airbag filling in a secondary reaction:
10Na + 2KNO3 ?
K2O + 5NA2O + N2
The other products of this reaction are potassium oxide (K2O) and sodium oxide (Na2O), which react with the third compound of the original airbag mixture, silicon dioxide (SiO2) to form alkaline silicate, or glass, which is a stable substance which can be harmlessly discarded once the airbag is deployed.
It is necessary to use such volatile gases because the airbag needs to instantly fill with gas to be effective in preventing the driver from moving forward toward the
aluminum oxide can be organise because the aluminum becomes the
Stoichiometry. (2004). Retrieved at:
whereas the required ratio of aluminum to oxygen for complete
0.52 mols Al203 = 0.52 x (53.96 + 48)
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