# Answer the following. How is SO2 prepared in laboratory from sodium sulfite? - Chemistry

Short Note

How is SO2 prepared in the laboratory from sodium sulfite?

#### Solution

In laboratory, sulfur dioxide is prepared by treating sodium sulfite with dilute sulfuric acid.

$\ce{\underset{\text{Sodium sulfite}}{Na2SO_{3(aq)}} + \underset{\text{Sulfuric acid (dil)}}{H2SO_{4(aq)}} -> \underset{\text{Sulfur dioxide}}{SO_{2(g)}} + \underset{\text{Sodium sulfate}}{Na2SO4_{4(aq)}} + H2O_{(l)}}$

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#### APPEARS IN

Balbharati Chemistry 12th Standard HSC for Maharashtra State Board
Chapter 7 Elements of Groups 16, 17 and 18
Exercise | Q 4.3 | Page 164