How do you separate salt from a saltwater mixture?
The saltwater can be distilled to remove the salt from the water.
Heating the salt water will cause the liquid water to vaporize. It can later be cooled, which causes it to condense back to the liquid state.
The salt is a non-volatile solute. This means that the dissolved salt will not varporize (turn into a gas). The salt will be left behind in the container that the saltwater is being heated in.
This video shows how to set up and run a distillation experiment. The red liquid you can see in the flask is saltwater with added food coloring.
Hope this helps!