Alcohols
What are Alcohols?
● Alcohols have the -OH- functional group
● The 1 in propan-1-ol or butan-1-ol tells you where the OH group is in the alcohol
Oxidation of Ethanol:
● All alcohols burn with oxygen to form carbon dioxide and water
● Ethanol is renewable as it’s made from biological sources like sugar canes
Microbial Oxidation:
● Ethanol in wine is oxidised by the air with microorganisms like bacteria or yeast
to form ethanoic acid
Heating with Potassium Dichromate:
● Add ethanol to a test tube containing Potassium Dichromate and dilute sulfuric
acid and then heat the test tube.
● The solution would turn green and contain a very dilute solution of ethanoic acid
and other products.
● The green colour forms as Cr3+ ions are present.
Production of Ethanol:
● Fermentation -
○ Yeast is added to sugar in anaerobic conditions which causes the yeast to
produce ethanol and carbon dioxide
What are Alcohols?
● Alcohols have the -OH- functional group
● The 1 in propan-1-ol or butan-1-ol tells you where the OH group is in the alcohol
Oxidation of Ethanol:
● All alcohols burn with oxygen to form carbon dioxide and water
● Ethanol is renewable as it’s made from biological sources like sugar canes
Microbial Oxidation:
● Ethanol in wine is oxidised by the air with microorganisms like bacteria or yeast
to form ethanoic acid
Heating with Potassium Dichromate:
● Add ethanol to a test tube containing Potassium Dichromate and dilute sulfuric
acid and then heat the test tube.
● The solution would turn green and contain a very dilute solution of ethanoic acid
and other products.
● The green colour forms as Cr3+ ions are present.
Production of Ethanol:
● Fermentation -
○ Yeast is added to sugar in anaerobic conditions which causes the yeast to
produce ethanol and carbon dioxide
