How do you seperate salt, sand, and iron fillings?
I know that to seperate the iron fillings you would use a magnet, but how do you seperate salt and sand?
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Salt would dissolve in water, but sand wouldn’t. Then you could strain out the water and let it evaporate.
Even more challenging would be separating salt and sugar. I can think of at least two ways to do it.
Take a plastic comb and rub it with to give it a static charge. It will attract salt but not sand.
You can use tweezers and a good magnifier. Salt crystals are cubic. Or do what they said, dissolve the salt in water, it is much easier.
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