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Diffusion 1:

  • Diffusion is the spreading of particles of a gas, or a substance dissolved in  a solution, from a region where the particles are at a higher concentration to where they are at a lower concentration.


  • Water and sugar molecules in the solution move around in all directions. the sugar concentration is higher at the bottom of the beaker than at the top.
  • By diffusion, there is a  net movement of sugar molecules from a more concentrated to a less concentrated region since, on average, there are more to move to thee less concentrated region than in the


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