Since substances in mixtures are only physically mixed together (as opposed to chemically combined), elaborate chemicals and measures are unnecessary. Methods in separating substances in a mixture...
Filter the sand out, and then evaporate the water, salt is left as dried.
Filtering , Boiling,Evaporating
distillation,crystallization,sublimation,filteration, etc
You can dissolve it, separate it out with your hands, evaporate it, or use magnets to separate the iron objects.
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