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Sulphur Dioxide preparation and laboratory preparation , industrial method

Posted by Dgf Chd 4 years ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 4 years ago

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)

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