Unit 2 : Oxidation Of Food Flashcards
What is formed as a result of the oxidation of a primary alcohol
Primary alcohol—>aldehyde—>carboxylic acid
What is formed as a result of oxidation of a secondary alcohol
Secondary alcohol—>ketone—>no further oxidation
What forms as a result of oxidation of a tertiary alcohol
No oxidation occurs
Oxidising agents
- hot copper oxide
- acidified dichromate solution
- fehlings solution
- tollens reagent
What colour change happens if an alcohol is oxidised by hot copper oxide
Black—>brown
What colour change happens when acidified dichromate oxidises and alcohol
Orange—>green
What colour change happens when fehlings solution oxides an aldehyde
Blue—>brick red
What colour change happens when tollens reagent oxides and aldehyde
Colourless—>silver
What functional group does aldehydes and ketones contain
O
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Carbonyl (C)
What intermolecular forces do aldehydes and ketone contain
Permanent dipole-permanent dipole as the C=O makes them polar
How to name an aldehyde (examples)
Methane—>methanal
Ethane—>ethanal
Propane—>propanal
How to name ketones
- The -e ending is replaced by -one.
* Example = hexan-3-one
What are anti-oxidants
Molecules that reduce the rate of oxidation reactions
