Water Bronsted-Lowry theory, role

In the Bronsted-Lowry theory, water no longer plays a spedal role, and the chentical... 

The Bronsted-Lowry Theory of Acids and Bases The Role of Water in the Brensted-Lowry Theory Weak Acids and Bases... 

When added to water, acids protonate water molecules to form hydro-nium (HjO ) ions and bases deprotonate water molecules to form hydroxide (OH ) ions. The ability of the Bronsted-Lowry theory to account for the presence these ions in solution arises from its recognition of the role played by the solvent and makes it a more general and useful theory than the Arrhenius theory. 

Because of the mentioned leveling effect of the solvent (or excess acid itself acting as such) the acidity cannot exceed that of its conjugate acid. In the case of water the limiting acidity is that of HsO. Proton-ated water, H30 (hydronium ion), was first postulated in 1907, and its preeminent role in acid-catalyzed reactions in aqueous media was first realized in the acid-base theory of Bronsted and Lowry. Direct experimental evidence for the hydronium ion in solution and in the... 

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