Actually, it isn't that easy. Salts dissociate into ionic forms when in aqueous form (dissolved in water). When they are evaporated out, there isn't a guarantee that they will end up with the same atoms that they started with. In other words, when you evaporate seawater and then add water to the dried salts, you won't get seawater again. I can't speak for all of the compounds formed but I do know that the calcium turns to a form that is not readily soluble in water. There is also an issue with the pH. It doesn't go back to 8.2.yogurt_21;3259488; said:...or sea salt that is acquired by evaporating sea water.