Resumen de All Positive Ions Give Acid Solutions in Water
The acidity of aqueous solutions of positive ions is never zero although many texts say incorrectly that most metals of Groups I and II and some others are not acidic. The few cases in which acidity may usually be regarded as negligible, but not zero, include the Group I metals other than lithium and quaternary ammonium ions and similar ions that cannot form a coordinate bond to a water molecule. The acid constants of metal ions are given in Table I one of the article.
