Topic 9: Alcohols Flashcards
Bond angle in alcohols
105 degrees between the O and the H
Physical properties of alcohols
OH group means it has higher melting and boiling points than alkenes
Short chains are hydrophilic
Conditions for reacting ethene with steam
300 degrees
60-70 ATM pressure
Phosphoric acid catalyst
Ethanol uses
Used as an intermediate
Cosmetics- aftershaves and perfumes
Manufacture of drugs
Conditions for fermentation (formation of alcohol)
Temperature of 35 degrees
ATM pressure
Anaerobic conditions
Hydration of ethene vs fermentation
Fast vs slow
Continuous vs batch
Pure vs impure
Ethanol as a fuel for cars
Pros vs cons
Renewable energy source
Petrol cars would have to be modified
Land used to grow food is taken up
They’re not 100 percent carbon neutral
Oxidation of primary alcohols
Form aldehydes and then carboxylic acids
Oxidation of secondary alcohols
Produce ketones
Testing for aldehydes
Fehlings- Will form a brick red precipitate
Tollens- Add tollens and a silver mirror will for m
Defenition of biofuel
A fuel which is derived from living matter
Defenition of carbon-neutral
A fuel which when used has no net increase on the amount of CO2 in the atmosphere
Which alcohold cant be oxidised?
Tertiary alcohols
What happens to the Chromate ions during oxidation of alcohols
The Cr6+ is reduced to Cr3+
