Book 30, Question 118
Why does distilled water taste flat, and what is it used for?
Distilled water is made by boiling water and catching the steam.
The dirt, salt, and minerals stay behind, and the steam turns back into nearly pure water on a cool surface. Without minerals, distilled water tastes flat. It is used in steam irons, car batteries, and science labs, where minerals could cause trouble. Only grown-ups should work with boiling water.