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