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 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]
Examples
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- Calcium oxide is the anhydride of calcium hydroxide
- Barium oxide is the anhydride of barium hydroxide
- Sodium oxide is the anhydride of sodium hydroxide
- Potassium oxide is the anhydride of potassium hydroxide
- Strontium oxide is the anhydride of strontium hydroxide
- Lithium oxide is the anhydride of lithium hydroxide
- Cesium oxide is the anhydride of cesium hydroxide
- Rubidium oxide is the anhydride of rubidium 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