How is so2 prepared
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Yogita Ingle 6 years, 11 months ago
In the laboratory, sulphur dioxide is prepared by the reaction of metallic sulphite or a metallic bisulphite with a dilute acid. For example, a reaction between the dilute sulphuric acid and sodium sulphite will result in the formation of SO2.
Na2SO3 + H2SO4 → Na2SO4 + H2O + SO2
Commercially it is obtained as a by-product released from the roasting of sulphide ores. The gas obtained is dried, liquefied and then stored in steel cylinders.
4FeS2 (s) + 11 O2 (g) →2Fe2O3 (s) + 8SO2 (g)
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