Edexcel IGCSE Chemistry · Spec 1.3-1.4
Diffusion & Key Terms
Diffusion and the key chemistry terms you need, explained with the particle model.
Chemistry revision video
Diffusion & Key Terms
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Spec 1.3-1.4
What you need to know
- Explain what diffusion is using particle theory
- Describe how the mass of a particle affects how fast it diffuses
- Use the terms solute, solvent, solution and saturated solution correctly
Active recall
Quick check
Answer each question before opening the answer.
What is diffusion?
The net movement of particles from a region of high concentration to a region of low concentration.
Why do lighter gas molecules diffuse faster than heavier ones?
At the same temperature they move at higher speeds, so they spread out more quickly.
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