Section 3: Organic chemistry
a)
Introduction
b)
Alkanes
c)
Alkenes
d)
Ethanol
a)
Introduction
Students will be assessed on their ability to:
3.1
explain the terms homologous series, hydrocarbon, saturated, unsaturated, general formula
and isomerism.
b)
Alkanes
Students will be assessed on their ability to:
3.2
recall that alkanes have the general formula CnH2n+2
3.3
draw displayed formulae for alkanes with up to five carbon atoms in a molecule, and name
the straight-chain isomers
3.4
recall the products of the complete and incomplete combustion of alkanes
3.5
recall the reaction of methane with bromine to form bromomethane in the presence of UV
light.
c)
Alkenes
Students will be assessed on their ability to:
3.6
recall that alkenes have the general formula CnH2n
3.7
draw displayed formulae for alkenes with up to four carbon atoms in a molecule, and
name the straight-chain isomers
3.8
describe the addition reaction of alkenes with bromine, including the decolourising of
bromine water as a test for alkenes.
d)
Ethanol
Students will be assessed on their ability to:
3.9
describe the manufacture of ethanol by passing ethene and steam over a phosphoric
acid catalyst at a temperature of about 300°C and a pressure of about 60–70 atm
3.10 describe the manufacture of ethanol by the fermentation of sugars, for example
glucose, at a temperature of about 30°C
3.11 evaluate the factors relevant to the choice of method used in the manufacture of
ethanol, for example the relative availability of sugar cane and crude oil
3.12 describe the dehydration of ethanol to ethene, using aluminium oxide.
