GCSE Chemistry — States of Matter and Mixtures

Led by Robert Boyle

Module 5 of Edexcel GCSE Chemistry. Led by Robert Boyle, whose 1661 The Sceptical Chymist drew the line between alchemy and chemistry by demanding experimental evidence. The student covers the particle model across solid, liquid, and gas; physical interconversions; the chemical meaning of purity; and the five separation techniques every working chemist relies on, including the Core Practical on inks.

1. Module 5

   States of Matter and Mixtures

   Led by Robert Boyle

   The question

   What does the particle model say about how matter is arranged in solids, liquids, and gases — and how does it explain the changes between them? When a chemist needs to separate a mixture into its components, which of the five techniques does the job, and how is the choice driven by the physical properties of the components? The spec asks the student to describe particle arrangement, movement, and energy in all three states; explain the six interconversions; distinguish pure from impure substances; match each separation technique to the mixtures it suits; interpret paper chromatograms and calculate Rf values; carry out the inks Core Practical; and describe the treatment of water for potability.

   Outcome

   the student can describe the particle model in all three states, name and explain the interconversions, distinguish pure substances from mixtures, choose the right separation technique for any mixture, calculate Rf values from chromatograms, carry out the inks Core Practical, and describe water treatment for potability and analysis. *(Edexcel 1CH0 Paper 1 — Topic 2, spec points 2.1–2.12)*

   Sub-units

   1. ○ 5.1 The particle model and the three states of matter Open this unit → ✓ ↻
   2. ○ 5.2 Interconversions and the energy of state change Open this unit → ✓ ↻
   3. ○ 5.3 Pure substances vs mixtures; melting-point evidence Open this unit → ✓ ↻
   4. ○ 5.4 Five separation techniques and when each applies Open this unit → ✓ ↻
   5. ○ 5.5 Paper chromatography and Rf values Open this unit → ✓ ↻
   6. ○ 5.6 Core Practical 2.11: inks by distillation and chromatography Open this unit → ✓ ↻
   7. ○ 5.7 Water treatment: potability and analytical purity Open this unit → ✓ ↻
   Begin the course → Print certificate of completion