denny you don't have to have brains to take chemistry, i am living proof of that. i think if the water evaporated it would leave a salt, which could be caustic, but it would prob run into water table before that. i know you can also boil hcl. don't ask me how i know i made a chem teacher mad by doing that in college. best i remember ph is all about being a hydrogen ion donor or accepter or acid/ base.
