Base anhydride
The oxides of group 1 and 2 elements (alkali metals and alkaline earth metals) are called base anhydrides. They are obtained by removing water from the corresponding hydroxide base. If water is added to a base anhydride, a corresponding hydroxide salt can be re-formed.
Base anhydrides are not Brønsted–Lowry bases because they are not proton acceptors. However, they are Lewis bases, because they will share an electron pair with some Lewis acids, most notably acidic oxides.[1]
Examples
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- Calcium oxide, which reacts with water forming calcium hydroxide
- Barium oxide, which reacts with water forming barium hydroxide
- Sodium oxide, which reacts with water forming sodium hydroxide
- Potassium oxide, which reacts with water forming potassium hydroxide
- Strontium oxide, which reacts with water forming strontium hydroxide
- Lithium oxide, which reacts with water forming lithium hydroxide
- Cesium oxide, which reacts with water forming cesium hydroxide
- Rubidium oxide, which reacts with water forming rubidium hydroxide
- Magnesium oxide, which reacts with water forming magnesium hydroxide
See also
References
- ^ Principles of Modern Chemistry, 7th Edition. David Oxtoby, H. P. Gillis, Alan Campion. Published by Cengage Learning. Page 675-676. ISBN 978-0840049315
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