Write down the equations of chemical reactions: S → SO2 → H2SO3 → Na2SO3
| March 3, 2021 | education
1. Combustion of sulfur in oxygen, the formation of poisonous sulfur dioxide.
S + O2 = SO2.
Interestingly, a person contains about 2 g per 1 kg of body weight.
2. Dissolving in water, sulfur oxide (V) forms sulfite acid.
SO2 + H2O = H2SO3.
3. Sulfurous acid reacts with sodium carbonate to form sulfite.
H2SO3 + Na2CO3 = Na2SO3 + CO2 + H2O.
Sodium sulfite is an E221 preservative.
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