3.3.6.1 Identification of functional groups by test-tube reactions
The reactions of functional groups listed in the specification.
Students should be able to:
• identify the functional groups using reactions in the specification.
Required practical 6
Tests for alcohol, aldehyde, alkene and carboxylic acid.
3.3.6.2 Mass spectrometry
Mass spectrometry can be used to determine the molecular formula of a
compound.
Students should be able to:
• use precise atomic masses and the precise molecular mass to determine
the molecular formula of a compound.
3.3.6.3 Infrared spectroscopy
Bonds in a molecule absorb infrared radiation at characteristic
wavenumbers.
‘Fingerprinting’ allows identification of a molecule by comparison of
spectra.
Students should be able to:
• use infrared spectra and the Chemistry Data Sheet or Booklet to
identify particular bonds, and therefore functional groups, and also to
identify impurities.
The link between absorption of infrared radiation by bonds
in CO
2, methane and water vapour and global warming.