Bronsted-lowry theory, Chemistry

Fundamentals of Acids and Bases

Bronsted-Lowry theory:

A Bronsted acid is a (proton) + donor, whilst a Brønsted base is a proton acceptor. An acid-base reaction involves the exchange of a proton between a base and an acid. An acid reacts with water to produce the hydronium ion, a conjugate base, and H3O+. A base reacts with water to produce the OH-, hydroxide ion, and a conjugate acid.

A reaction between an acid and a base (an acid-base reaction) involves the exchange of a proton, for example:

HCl+NH3→Cl-+NH4+

These definitions apply under all conditions, but the most important acid-base systems use water as a solvent. In this case, equilibria are set up in water, which for HA (a general acid) is:

 

724_bronsted lowry theory.png

and for B (a general base) is:

1907_bronsted lowry theory1.png 

 

 

Posted Date: 7/20/2012 3:40:48 AM | Location : United States







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