describe these experimental techniques for the separation of mixtures:
- simple distillation
- fractional distillation
- filtration
- crystallisation
- paper chromatography.
describe these experimental techniques for the separation of mixtures:
understand how a chromatogram provides information about the composition of a mixture
understand how to use the calculation of Rf values to identify the components of a mixture
practical: investigate paper chromatography using inks/food colourings
understand how to classify a substance as an element, compound or mixture
understand that a pure substance has a fixed melting and boiling point, but that a mixture may melt or boil over a range of temperatures