How to separate salt pepper and iron fillings?
To separate a mixture of salt, pepper, and iron fillings, you can take advantage of their different physical properties. Here's one way to do it:
1. Use a magnet to separate the iron fillings from the rest of the mixture. The iron fillings are attracted to magnets, so you can pass the magnet over the mixture. The iron fillings will stick to the magnet, allowing you to separate them from the salt and pepper.
2. After removing the iron fillings, you will be left with a mixture of salt and pepper. To separate them, you can use the principle of solubility. Salt is soluble in water, while pepper is not.
3. Add water to the mixture and stir it thoroughly. The salt will dissolve in the water, while the pepper will remain separate.
4. Now, you have a saltwater solution and undissolved pepper. To obtain pure salt, you can evaporate the water. Place the saltwater solution in a heat-resistant container and heat it gently. The water will evaporate, leaving behind the salt crystals.
5. Finally, you are left with the separated iron fillings, the undissolved pepper, and the pure salt crystals.
By following these steps, you can effectively separate the salt, pepper, and iron fillings from the initial mixture.