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In conversion from ethanol to ethene, concentrated sulphuric acid is used as:
- a)Precipitating agent
- b)Oxidizing agent
- c)Dehydrating agent
- d)Reducing agent
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
In conversion from ethanol to ethene, concentrated sulphuric acid is u...
Sulphuric acid is used as a dehydrating agent because sulphuric acid has a great affinity for water. It readily removes elements of water from other compounds i.e, it acts as a dehydrating agent, it being a hygroscopic substance absorbs water from other substances without dissolving in it, so it is considered a good drying agent.
Most Upvoted Answer
In conversion from ethanol to ethene, concentrated sulphuric acid is u...
It is used as dehydrating agent bcoz ethene contains less hydrogen in comparison to ethanol so for having ethene we have to dehydrate ethanol
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In conversion from ethanol to ethene, concentrated sulphuric acid is u...
Dehydrating Agent
In the conversion from ethanol to ethene, concentrated sulphuric acid is used as a dehydrating agent. A dehydrating agent is a substance that removes water molecules from a compound, resulting in the formation of a new compound.
Reaction
The reaction between ethanol and concentrated sulphuric acid involves the removal of a water molecule (dehydration) to form ethene.
CH₃CH₂OH + H₂SO₄ → CH₂=CH₂ + H₂O
Explanation
Concentrated sulphuric acid is a strong and highly reactive acid. It has a strong affinity for water and acts as a dehydrating agent by abstracting a water molecule from the ethanol molecule. The reaction occurs in two steps:
- Protonation of ethanol: The concentrated sulphuric acid donates a proton (H⁺) to the oxygen atom in the hydroxyl group of ethanol, forming an ethyl oxonium ion.
- Dehydration: The ethyl oxonium ion loses a water molecule, resulting in the formation of ethene.
CH₃CH₂OH + H₂SO₄ → CH₃CH₂OH₂⁺ + HSO₄⁻
CH₃CH₂OH₂⁺ → CH₂=CH₂ + H₂O
Overall, the concentrated sulphuric acid acts as a dehydrating agent by removing a water molecule from ethanol, leading to the formation of ethene.
Importance
The conversion of ethanol to ethene is an important reaction in the petrochemical industry as ethene is a valuable raw material for the production of various chemicals and plastics. The use of concentrated sulphuric acid as a dehydrating agent allows for the efficient and selective production of ethene from ethanol.
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In conversion from ethanol to ethene, concentrated sulphuric acid is used as:a)Precipitating agentb)Oxidizing agentc)Dehydrating agentd)Reducing agentCorrect answer is option 'C'. Can you explain this answer?
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