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In the UK industrial ethanol is now produced by the direct hydration of ethene - AQA - A-Level Chemistry - Question 32 - 2019 - Paper 3

Question 32

In the UK industrial ethanol is now produced by the direct hydration of ethene. This process has largely replaced the fermentation method. Which is a likely reason ... show full transcript

Worked Solution & Example Answer:In the UK industrial ethanol is now produced by the direct hydration of ethene - AQA - A-Level Chemistry - Question 32 - 2019 - Paper 3

Step 1

A. The direct hydration route produces purer ethanol.

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Answer

The direct hydration route indeed produces purer ethanol compared to the fermentation method. This is a significant advantage as the produced ethanol can be used directly in various applications without further purification processes, thereby reducing costs and enhancing efficiency.

Step 2

B. The direct hydration route employs milder conditions.

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Answer

This statement is inaccurate. The direct hydration of ethene typically requires high temperatures and pressures to be efficient, which does not qualify it as milder compared to fermentation conditions.

Step 3

C. The direct hydration route does NOT use a catalyst.

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Answer

This is incorrect. The direct hydration process usually involves a catalyst, typically acid, to promote the reaction, making it more efficient.

Step 4

D. The direct hydration route produces ethanol by a slower reaction.

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Answer

This is not true. The direct hydration of ethene is designed to be a rapid process compared to fermentation, which can take several days.

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In the UK industrial ethanol is now produced by the direct hydration of ethene - AQA - A-Level Chemistry - Question 32 - 2019 - Paper 3

Worked Solution & Example Answer:In the UK industrial ethanol is now produced by the direct hydration of ethene - AQA - A-Level Chemistry - Question 32 - 2019 - Paper 3

A. The direct hydration route produces purer ethanol.

B. The direct hydration route employs milder conditions.

C. The direct hydration route does NOT use a catalyst.

D. The direct hydration route produces ethanol by a slower reaction.

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