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One of the characteristics of this gas is the smell of burning sulfur. If the concentration of sulfur dioxide gas increases above 1.9 PPM, it causes irritation and discomfort in the person. If this gas is under pressure and the temperature is -10 degrees Celsius, it turns into a colorless liquid. Sulfur dioxide gas dissolves in water and produces sulphurous acid, which is dangerous. The main sources of sulfur dioxide gas are coal burning, power plants, and copper smelting industries. Meanwhile, it should be noted that sulfur dioxide gas is also produced in nature from volcanic activities.
If inhaled, this gas may cause death and can cause serious damage to the eyes and respiratory system, including the lungs. It is possible that the effects of this gas will appear in a person after some time.
Preparation of sulfur dioxide gas
The production of sulfur dioxide gas is done by two laboratory and industrial methods. In the laboratory method to produce sulfur dioxide, they use the most common method, which is to act an acid on alkali metal sulfide.
According to the following reaction:
Na2SO3 + 2HCl → 2NaCl + SO2 + H2O
NaHSO3 + HCl → NaCl + SO2 + H2O
Na2S2O3 + 2HCl → 2NaCl + S + SO2 + H2O
There is another method to produce sulfur dioxide gas (SO2) in the laboratory, they react hot and concentrated sulfuric acid on elements such as copper, silver, sulfur and carbon, which are considered reducing elements.
According to the following reaction:
Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O
2Ag + 2H2SO4 → Ag2SO4 + SO2 + 2H2O
Hg + 2H2SO4 → HgSO4 + SO2 + 2H2O
S + 2H2SO4 → 3SO2 + 2H2O
C + 2H2SO4 → CO2 + 2SO2 + 2H2O
Another method of producing sulfur dioxide is industrial preparation. In this method, they burn sulfur, sulfide, and hydrogen sulfide. Many companies' needs for sulfur dioxide gas are met by burning sulfur.
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