Details: Investigate how paper chromatography can be used to separate and tell the difference between coloured substances. Students should calculate Rf values
Techniques: Use of appropriate apparatus to make and record a range of measurements accurately. Safe use of a range of equipment to purify and/or separate chemical mixtures including chromatography.
Skills: Carry out experiments appropriately having due regard for the correct manipulation of apparatus, the accuracy of measurements and health and safety considerations. Make and record observations and measurements using a range of apparatus and methods.