IGCSE Chemistry Notes on The Experimental Techniques

  • Cambridge IGCSE Chemistry Revision Notes  prepared by Cambridge trained staff with rich experience.

Syllabus Objectives:

2.1 Measurement 


  • Name appropriate apparatus for the measurement of time, temperature, mass and volume, including burettes, pipettes and measuring cylinders

2.2 Purity

2.2.1 Criteria of purity


  • Demonstrate knowledge and understanding of paper chromatography 
  • Interpret simple chromatograms 
  • Identify substances and assess their purity from melting point and boiling point information 
  • Understand the importance of purity in substances in everyday life, e.g. foodstuffs and drugs Supplement 
  • Interpret simple chromatograms, including the use of Rf values 
  • Outline how chromatography techniques can be applied to colourless substances by exposing chromatograms to substances called locating agents. (Knowledge of specific locating agents is not required.)

2.2.2 Methods of purification


  • Describe and explain methods of purification by the use of a suitable solvent, filtration, crystallization and distillation (including use of a fractionating column). (Refer to the fractional distillation of petroleum in section 14.2 and products of fermentation in section 14.6.) 
  • Suggest suitable purification techniques, given information about the substances involved

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