Ethanol is produced by the fermentation of glucose - Edexcel - GCSE Chemistry - Question 3 - 2015 - Paper 1
Question 3
Ethanol is produced by the fermentation of glucose.
Yeast is needed for the fermentation reaction.
(i) State two other conditions for fermentation.
(ii) Complete t... show full transcript
Worked Solution & Example Answer:Ethanol is produced by the fermentation of glucose - Edexcel - GCSE Chemistry - Question 3 - 2015 - Paper 1
Step 1
State two other conditions for fermentation.
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Answer
The fermentation process occurs in the absence of air (anaerobic conditions).
The temperature should be maintained between 25°C and 40°C for optimal yeast activity.
Step 2
Complete the sentence by putting a cross (✗) in the box next to your answer.
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Answer
The correct answer is B fractional distillation.
Step 3
Write the balanced equation for the fermentation of glucose, C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.
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Answer
The balanced equation for the fermentation of glucose is:
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Answer
Ethene must be subjected to high temperatures and pressures during the reaction.
A catalyst, often concentrated sulfuric acid, is used to facilitate the hydration process.
Step 5
Explain why the country would prefer to produce its ethanol from ethene rather than by fermentation.
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Answer
The country would prefer to produce ethanol from ethene due to the following reasons:
Land Efficiency: Ethanol production from ethene does not require large agricultural areas for growing crops, which is beneficial given the limited fertile land.
Speed of Production: The production process using ethene is faster compared to fermentation, which is slow and requires considerable time.
Resource Sustainability: With substantial crude oil reserves, the country can ensure a steady supply of ethene for production, which may be more reliable than farming for fermentation feedstock.
