Distillation is the purification of a liquid by boiling and condensing it and then separating the parts that come out. Different components in a liquid have different boiling and condensation points, so you can control the temperature and thus control what substances are removed.
So yes, there is such a thing as distilled water. Distilled water is just water that’s been boiled and then the vapor is collected in a separate container and cooled back into liquid water. Everything left in the original container was all the stuff (minerals, contaminants…etc) that was in the water, and then all that’s in the new container is pure water.
Alcohol can also be distilled to purify and concentrate the ethanol and remove other unwanted contaminants or byproducts of the fermentation process. You can repeat the distillation multiple times to achieve the desired purity and concentration.
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