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Ethanol by Fermentation

AQA AS-level ChemistryAlcoholsLesson 4 of 13

Fermentation is the conversion of sugars such as glucose into ethanol and carbon dioxide by enzymes in yeast:

C6H12O6(aq) → 2CH3CH2OH(aq) + 2CO2(g)

The glucose comes from crops such as sugar cane, sugar beet or maize.

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