Unit 2 : Oxidation Of Alcohols Flashcards
When applied to carbon compounds
Oxidation results in an ———— in the oxygen to hydrogen ratio
Oxidation results in an increase in the oxygen to hydrogen ratio
When applied to carbon compounds
Reduction results in a ———— in the oxygen to hydrogen ratio.
Reduction results in a decrease in the oxygen to hydrogen ratio
What products are formed when Primary alcohols are oxidised
Primary Alcohol -> Aldehyde -> Carboxylic Acid
What products are formed when secondary alcohols are oxidised?
Secondary Alcohol -> Ketone
What products are formed when tertiary alcohols are oxidised?
No oxidation
Which two solutions can be used to oxidise primary alcohols and secondary alcohols.
Hot Copper (II) Acid Acidified dichromate Solution
During the oxidation reaction of Alcohols what is the colour change of the solution that is used to oxidise
Hot Copper (II) Oxide = black to brown Acidified Dichromate Solution = orange to green
What is the functional group that contains within Adehydes and ketones
Carbonyl Functional group
Aldehydes, but not ketones, can be oxidised to carboxylic acids. Oxidising agents can be
used to differentiate between an aldehyde and a ketone. With an aldehyde:
Acidified Dichromate Solution = Orange to Green
Fehling’s Solution = Blue to Brick Red
Tollen’s Reagent = Colourless to Silver Mirror
Many flavour aroma moleucles are ——
Adehydes
In whiskey, oxygen diffuses into the cask and forms aldehydes contibuting to the flacour in whiskey.
State what happens to oil to make it go Rancid
Oxygen from air causes the oxidationn of food giving edible oil foods a rancid flavouring
What are antioxidants
Antioxidants are molecules which prevent unwanted oxidation reaction from occuring
How does Antioxidants work?
Antioxidants are substances that are easily oxidised.
Anitoxidents moleucles are oxidies instaed of the compounds they are being used to protect.
Anitoxidants can be identified as the substance being oxidised in a redox reaction.
