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Basic oxides are oxides that show basic properties, in opposition to acidic oxides. A basic oxide can either react with water to form a base, or with an acid to form a salt and water in a neutralization reaction.[according to whom?]
Examples include:
An oxide is a chemical compound in which one or more oxygen atoms combined with another element, such as H2OorCO2. Based on their acid-base characteristics, oxides can be classified into four categories: acidic oxides, basic oxides, and amphoteric oxides and neutral oxides.[according to whom?]
A basic oxide, also called a base anhydride (meaning "base without water"), is usually formed in the reaction of oxygen with metals, especially alkali (group 1) and alkaline earth (group 2) metals. Both of these groups form ionic oxides that dissolve in water to form basic solutions of the corresponding metal hydroxide:
Alkali metals (Group 1)
Alkaline earth metals (group 2)
For example, the basic oxide Li2O becomes the hydroxide LiOH, and BaO becomes Ba(OH)2 after reacting with water. In contrast, non-metals usually form acidic oxides. In general, the basicity of oxides increases when towards the lower-left corner of the periodic table, which corresponds to increased metallic properties.[1]
