How to separate mixtures:
1. Hand Separation
Example: Separating salt and sand
2. Filtration
Example: Sand and Water
3. Distillation
Example: Alcohol and Water
4. Chromatography, for separating different substances to determine whether they are banned substances
5. Etc. There are a whole lot of other techniques but they are too complicated and not required at this level.
http://www.chemteam.info/Matter/SeparationOfMixtures.html
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