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Ethanol can be made by fermentation - Edexcel - GCSE Chemistry - Question 2 - 2014 - Paper 1
Question 2
Ethanol can be made by fermentation. (a) (i) In a fermentation reaction, yeast is added to sugar solution. Complete the sentence by putting a cross (X) in the box ... show full transcript
Worked Solution & Example Answer:Ethanol can be made by fermentation - Edexcel - GCSE Chemistry - Question 2 - 2014 - Paper 1
Step 1
Step 2
Explain how the contents of the flask at 75°C would be different from the contents of the flask at 40°C.
Answer
At 75°C, the high temperature would inhibit the activity of yeast, potentially killing the yeast cells, which would prevent fermentation from occurring. In contrast, the flask at 40°C would have active yeast, allowing for the production of ethanol. The flask at 40°C would contain a significant amount of ethanol, while the flask at 75°C might have little to no ethanol present.