Ethanol is produced by the fermentation of glucose solution - Edexcel - GCSE Chemistry - Question 3 - 2013 - Paper 1
Question 3
Ethanol is produced by the fermentation of glucose solution.
(i) Describe how this fermentation is carried out.
(ii) Complete the word equation for the fermentatio... show full transcript
Worked Solution & Example Answer:Ethanol is produced by the fermentation of glucose solution - Edexcel - GCSE Chemistry - Question 3 - 2013 - Paper 1
Step 1
Describe how this fermentation is carried out.
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Answer
The fermentation of glucose is carried out by adding yeast to the glucose solution. The yeast contains the enzyme zymase, which catalyzes the fermentation process. This occurs in anaerobic conditions, meaning there is an absence of air. A suitable fermentation setup involves attaching an airlock or inserting a plug of cotton wool to prevent air from entering. The fermentation is kept at a temperature of less than 40°C for optimal yeast activity.
Step 2
Complete the word equation for the fermentation of glucose.
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Answer
glucose → ethanol + carbon dioxide
Step 3
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
C – fractional distillation
Step 4
State a possible harmful effect of consuming too many alcoholic drinks.
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Answer
One potential harmful effect of consuming too many alcoholic drinks is liver damage, which can lead to conditions such as alcoholism or alcohol poisoning.
