iGCSE Chemistry - Formulae, functional groups and terminology

**This Powerpoint specifically uses the Cambridge iGCSE Chemistry Syllabus and covers all criteria for – Unit 11.1 Formulae, functional groups and terminology
**

Students will be able to -

1 Draw and interpret the displayed formula of
a molecule to show all the atoms and all the
bonds

2 Write and interpret general formulae of
compounds in the same homologous series,
limited to:
(a) alkanes, CnH2n+2
(b) alkenes, CnH2n
© alcohols, CnH2n+1OH
(d) carboxylic acids, CnH2n+1COOH

3 Identify a functional group as an atom or
group of atoms that determine the chemical
properties of a homologous series

SUPPLEMENT

4 State that a homologous series is a family
of similar compounds with similar chemical
properties due to the presence of the same
functional group

5 State that a saturated compound has
molecules in which all carbon–carbon bonds
are single bonds

6 State that an unsaturated compound has
molecules in which one or more carbon–
carbon bonds are not single bonds

7 State that a structural formula is an
unambiguous description of the way the atoms
in a molecule are arranged, including CH2=CH2,
CH3CH2OH, CH3COOCH3

8 Define structural isomers as compounds with
the same molecular formula, but different
structural formulae, including C4H10 as
CH3CH2CH2CH3 and CH3CH(CH3)CH3 and
C4H8 as CH3CH2CH=CH2 and CH3CH=CHCH3

9 Describe the general characteristics of a
homologous series as:
(a) having the same functional group
(b) having the same general formula
© differing from one member to the next by
a –CH2– unit
(d) displaying a trend in physical properties
(e) sharing similar chemical properties

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**

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