#C5.1.1
explain that many useful materials are formulations of mixtures
#C5.1.2
explain what is meant by the purity of a substance, distinguishing between the scientific and everyday use of the term ‘pure’
#C5.1.3
use melting point data to distinguish pure from impure substances
#C5.1.4
recall that chromatography involves a stationary and a mobile phase and that separation depends on the distribution between the phases
#C5.1.5
interpret chromatograms, including calculating Rf values
#C5.1.6
suggest chromatographic methods for distinguishing pure from impure substances
PAG4
Including the use of:
a) paper chromatography
b) aqueous and non-aqueous solvents
c) locating agents
#C5.1.7
describe, explain and exemplify the processes of filtration, crystallisation, simple distillation, and fractional distillation
PAG3, PAG7
#C5.1.8
suggest suitable purification techniques given information about the substances involved
PAG3, PAG7