Chemistry › Section K · Solutions and colloids › Topic K.5
Colloids
Milk, fog, paint, jelly and whipped cream look smooth and uniform, yet none of them is a true solution. They are colloids, mixtures whose particles are too small to settle but large enough to scatter light, and their special behaviour is at work in cooking, cleaning, medicine and water treatment.
In this topic
- Between a solution and a suspension
- Sizes and properties
- The Tyndall effect
- Naming the parts and the types
- Worked example: classifying colloids
- Making colloids
- Worked example: why surfaces matter
- Emulsions, soaps and detergents
- Keeping colloids apart, and breaking them
- Worked example: solution, colloid or suspension?
- Common mistakes to avoid
- Key takeaways
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