Question

How can you obtain pure water from ocean water?

Answer 1

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♦You can boil the sea water and collect the vapour and cool it down to get the water back into the liquid phase which will be pure. Since salt has a higher boiling point , it will be left behind.

• Potable water can be made from sea water, through a process known as desalination .

• Desalination can be done by distillation and by reverse osmosis.

• Distillation requires a lot of energy to boil the water, and also to cool the steam down to condense it.