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  • Ethene is formed when ethanol at 443 K is heated with excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation of this reaction.

Ethene is formed when ethanol at 443 K is heated with excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation of this reaction.

Answers (1)

When ethanol is heated with excess of concentrated sulphuric acid at 170^{\circ}C, it gets dehydrated to form ethene.

The reaction is as follows:

CH_3CH_2OH \overset{Conc. H_{2}SO_{4}}{\rightarrow} CH_2 = CH_2 + H_2O

Concentrated sulphuric acid removes water from ethanol, thereby, acting as a dehydrating agent.

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