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How Do I Separate Salt from Water in Saltwater?

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If you were stranded on an island, you might need to know how to purify sea water to drink it.

If you were stranded on an island, you might need to know how to purify sea water to drink it.

Anne Helmenstine

Question: How Do I Separate Salt from Water in Saltwater?

Have you ever wondered how you could purify seawater to drink it or how you could separate salt from water in saltwater? It's really very simple.

Answer: You can boil or evaporate the water and the salt will be left behind as a solid. If you want to collect the water, you can use distillation. One way to do this at home would be to boil the saltwater in a pot with a lid. Offset the lid slightly so that the water that condenses on the inside of the lid will run down the side to be collected in a separate container. Congratulations! You've just made distilled water. When all of the water has boiled off, the salt will remain in the pot. Evaporation works the same way, just at a slower rate.

Distill Water from Saltwater

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