1. Magnetic Separation:
* What it does: Iron is a magnetic material, so you can use a magnet to easily separate it from the other components.
* How to do it: Simply hold a magnet near the mixture. The iron fillings will stick to the magnet, allowing you to remove them.
2. Sublimation:
* What it does: Mothballs are typically made of naphthalene, which sublimes (transitions directly from solid to gas) at room temperature.
* How to do it: Place the remaining mixture in a container with a lid. Carefully heat the container gently. The naphthalene will sublimate and escape as a gas, leaving the remaining components behind. You'll need to carefully collect the sublimated naphthalene on a cool surface.
3. Dissolution:
* What it does: Salt is soluble in water, while sand is not.
* How to do it: Add water to the remaining mixture. The salt will dissolve. Carefully decant (pour off) the salt solution from the sand. You can then evaporate the water from the salt solution to recover the solid salt.
4. Filtration:
* What it does: This step removes any remaining sand that might have been carried over with the salt solution.
* How to do it: Filter the salt solution through filter paper. The sand will be trapped on the filter paper, leaving the salt solution to pass through.
Summary of Steps:
1. Magnetic Separation: Remove iron filings with a magnet.
2. Sublimation: Separate mothballs by gently heating the mixture.
3. Dissolution: Dissolve the salt in water.
4. Decantation: Pour off the salt solution, leaving the sand behind.
5. Filtration: Filter the salt solution to remove any remaining sand.
6. Evaporation: Evaporate the water from the salt solution to recover the solid salt.
Important Notes:
* Safety First: Always use appropriate safety gear when dealing with chemicals or heat.
* Careful Observation: Monitor the mixture closely during sublimation and dissolution to avoid any accidents.
* Thoroughness: Repeat each separation step as needed to ensure a complete separation of all components.
