Base anhydride

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The oxides of Group I and II metals (Alkali metals and Alkali earth metals) are called base anhydrides. They are obtained by removing water from the corresponding hydroxide salt. If water is added to a base anhydride, a corresponding hydroxide base can be re-formed. A base anhydride is neither an Arrhenius base, nor a Brønsted–Lowry Base, since it does not accept protons and do not increase the hydroxide ion concentration of water. However, a base anhydride is a Lewis Base, since it will share an electron pair with some Lewis acids, most notably acidic oxides.[1]


See also[edit]

Acidic oxide


  1. ^ Principles of Modern Chemistry, 7th Edition. David Oxtoby, H. P. Gillis, Alan Campion. Published by Cengage Learning. Page 675-676. ISBN 978-0840049315