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Cambridge IGCSE chemistry

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  1. States of matter
    States of matter
    3 Topics
  2. Changing state
    4 Topics
  3. Diffusion
    4 Topics
  4. Atoms, elements and compounds
    Elements, compounds and mixtures
  5. Atomic structure and the Periodic Table
  6. Isotopes
  7. Ions and ionic bonds
  8. Simple molecules and covalent bonds
  9. Giant covalent structures
  10. Metallic bonding
  11. Stoichiometry
    Formulas of compounds
    3 Topics
    |
    1 Quiz
  12. Chemical equations
    5 Topics
  13. Relative atomic and molecular mass
    2 Topics
  14. Moles
    2 Topics
  15. Calculating masses in reactions
    3 Topics
  16. Percentage yield and percentage purity
    2 Topics
  17. Empirical and molecular formulae
    2 Topics
  18. Moles and concentration
    2 Topics
  19. Calculating gas volumes

Quizzes

Cambridge IGCSE chemistry Diffusion What is diffusion
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Lesson 3, Topic 1
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What is diffusion

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Diffusion is the spreading of one substance into another due to the random motion of the particles

  • Diffusion is explained by the kinetic particle theory. Particles collide randomly with each other leading to complete mixing of the particles

  • Diffusion in gases is faster than diffusion in liquids because the particles in gases move faster

  • Diffusion does not happen in solids because the particles are fixed in position 

  • The overall movement of particles is from where they are more concentrated to where they are less concentrated