Question

laboratory preparation of sulfur. ph​

Answer 1

Explanation:

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)