Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Amphoteric Compounds

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_5242-1

Synonyms

Definition

An amphoteric compound is a compound that can act both as an acid and as a base. Some metal oxides or metal hydroxides, such as aluminum oxide (Al 2O 3), show amphotericity:
$$ \mathrm{With}\ \mathrm{a}\ \mathrm{base}:\ \mathrm{A}{\mathrm{l}}_2{\mathrm{O}}_3+2\ \mathrm{Na}\mathrm{OH}+3{\mathrm{H}}_2\mathrm{O}\rightleftharpoons 2\ \mathrm{N}\mathrm{a}{\left[\mathrm{A}\mathrm{l}{\left(\mathrm{O}\mathrm{H}\right)}_4\right]}^{-} $$

Keywords

Aqueous Solution Organic Compound Acidic Solution Metal Oxide Negative Charge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Yokohama National UniversityYokohamaJapan