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Diffusion

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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Diffusion
Diffusion occurs when particles spread. They move from a region where they are in high concentration to a region where they are in low concentration until they are equally dispersed. Diffusion happens when the particles are free to move. This is true in gases and for particles dissolved in solutions.

Dissolving
During dissolving, particles of solvent collide with particles of solute. They surround the particles of solute, gradually moving them away until the particles are evenly spread through the solvent.

At the end of viewing this video, you should be able to:
– describe the phenomenon of diffusion
– demonstrate the process of diffusion between substances in different states of matter
– name the factors that affect the rate of diffusion and explain the relationship between them
– indicate examples of diffusion in the immediate surroundings
– describe the process of dissolution and define the terms solvent, solute and solution
– name the factors that affect the process of dissolution and describe their effect.



Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


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