Oxidation of Food Flashcards
Which two types of alcohols can be oxidised?
Primary and secondary.
What can be used to oxidise alcohols?
Mild oxidising agents such as hot copper (II) oxide and acidified potassium dichromate.
What colour change is observed when ethanol is mixed with acidified potassium dichromate?
Orange to green.
What do primary alcohols oxidise to?
An aldehyde and then a carboxylic acid.
What does a secondary alcohol oxidise to ?
A ketone.
Which will always give a positive test; an aldehyde or ketone?
An aldehyde.
What three tests can be used to distinguish between an aldehyde and ketone?
Acidified potassium dichromate (orange to green)
Fehlings (blue to orange)
Tollens (clear to silver mirrored effect)
What functional group is on a ketone and aldehyde?
Carbonyl group
Where is the carbonyl group always found on an aldehyde?
On the end of the carbon chain.
What does the naming of an aldehyde end in?
-al.
Where is the carbonyl never found on a ketone?
The end of the carbon chain.
What doe the name of a ketone end in?
-one.
