Question

how is sulphur dioxide prepared from 1) sulfur 2) sulfite​

Answer 1

• Preparation of Sulphur Dioxide:-

1. In the laboratory, sulphur dioxide is prepared by the reaction of metallic sulphite or a metallic bisulphite with 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

2. 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)

Answer 2

Answer:

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