Acid and base
Long, Franklin A. Formerly, Department of Chemistry, Cornell University, Ithaca, New York.
Boyd, Richard H. Department of Chemical Engineering, University of Utah, Salt Lake City, Utah.
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- Arrhenius-Ostwald theory
- Brönsted theory
- Lewis theory
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In the Brönsted classification, an acid is any chemical species, ionic or molecular, capable of donating a proton (hydrogen ion) to another substance; the other substance acts as a base in accepting the proton. For these two interrelated classes of chemical compounds, the precise definitions have varied considerably with the development of chemistry. However, the Brönsted classification is the most used.
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