EDEXCEL GCSE Chemistry Unit C3 Chemistry in action
Chemistry Unit C3 Topic 5 Organic chemistry
5.1 Be able to describe how ethanol is produced during the fermentation of
a) that the fermentation mixture is kept warm and under
b) that yeast provides an enzyme for this reaction
5.2 Revise the investigation on preparing a solution of ethanol by fermentation.
5.3 Know that different
percentages of ethanol are present in various drinks.
5.4 Be able to demonstrate an
understanding of the social issues and possible harmful effects of ethanol in
5.5 Be able to explain how to obtain a concentrated solution of ethanol by
fractional distillation of the fermentation mixture.
5.6 HT only: Know how ethanol can
also be manufactured by reacting ethene (from cracking of crude oil fractions)
5.7 HT only: Be able to evaluate the factors which are relevant to the choice of method
used in the manufacture of ethanol, including:
a) the relative availability of
sugar cane or sugar beet and crude oil
b) the quality of the final product and
whether it needs further processing
5.8 HT only: Know that the dehydration of ethanol results in the formation of ethene.
5.9 Be able to define homologous series as a series of compounds which:
a) have the same
b) show a gradual variation in physical properties as exemplified
by their boiling points
c) have similar chemical properties
5.10 Know the names, formulae and structures of members of the following
a) alkanes, up to 4 carbons atoms per molecule
b) alkenes, up
to 3 carbons atoms per molecule
HT only: c) alcohols, up to 3 carbons atoms per molecule
HT only: d)
carboxylic acids, up to 3 carbon atoms per molecule (no treatment of isomers is required in any of these series)
5.11 Be able to demonstrate an understanding that ethanol can be oxidised to form
ethanoic acid and that this reaction occurs in open bottles of wine and in the
production of ethanoic acid in vinegar.
5.12 Be able to describe the use of vinegar as a
flavouring and as a preservative.
5.13 Be able to demonstrate an understanding that ethanoic
acid is a typical acid, including:
a) its reaction with metals
b) its reaction
with bases and carbonates to form salts (ethanoates)
c) its typical effect on
5.14 Be able to describe the reaction of ethanol with ethanoic acid to produce an ester,
ethyl ethanoate and water (HT only) including writing an equation for this reaction using
molecular and structural formulae.
5.15 Be able to describe uses of:
a) esters as flavourings
and perfumes, as they are pleasant- smelling
b) polyesters as fibres to make
fabric and as plastics for making bottles (no consideration of the formation of
polyester is required)
5.16 Be able to demonstrate an understanding that polyesters can be recycled to form
fleece that is used to make clothing.
5.17 Know that oils and fats are esters.
5.18 Be able to describe the breaking down of oils and fats, by boiling with concentrated
alkali solution, to produce soaps, which are sodium or potassium salts of long
carbon chain carboxylic acids.
5.19 HT only: Be able to demonstrate an understanding of how a soap
removes dirt or grease, including:
a) that part of the soap anion is hydrophobic
and dissolves in dirt or grease
b) that the other part is hydrophilic and
dissolves in water
5.20 HT only: Be able to demonstrate an understanding that liquid oils can be converted to solid
fats by catalytic hydrogenation which removes the C=C unsaturation and that
this process is used to manufacture margarine.
Revision Notes and Quizzes to
help you revise
Edexcel GCSE CHEMISTRY
When revising, these pages
provide you with a summary of what you need to know and be able to do.
BUT remember, your primary
source of revision are your class notes, investigations and Edexcel GCSE