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Ethanol is produced by the fermentation of glucose solution - Edexcel - GCSE Chemistry - Question 4 - 2015 - Paper 1
Question 4
Ethanol is produced by the fermentation of glucose solution. (i) Give the name of the substance added to the glucose solution to provide the enzymes needed for ferm... show full transcript
Worked Solution & Example Answer:Ethanol is produced by the fermentation of glucose solution - Edexcel - GCSE Chemistry - Question 4 - 2015 - Paper 1
Step 1
Give the name of the substance added to the glucose solution to provide the enzymes needed for fermentation.
Answer
The substance added to the glucose solution is called yeast. Yeast contains enzymes that facilitate the fermentation process, converting glucose into ethanol and carbon dioxide.
Step 2
Which process is used to obtain a concentrated solution of ethanol from this dilute solution?
Answer
The appropriate process to obtain a concentrated solution of ethanol is D fractional distillation. This method separates components based on their boiling points, efficiently enriching the ethanol concentration.
Step 3
State the effect of drinking alcohol on a person’s reaction times.
Answer
Drinking alcohol generally slows down a person's reaction times. Alcohol acts as a depressant, affecting the central nervous system, which can impair cognitive functions and motor skills, leading to slower responses to stimuli.