sulfate ion
Quick Summary
The sulfate ion, with the chemical formula [SO4]2-, is a key component in chemistry, representing a derivative of sulfuric acid (H2SO4). This ion consists of a central sulfur atom bonded to four oxygen atoms, arranged in a tetrahedral structure.123
Sulfates exist in two main forms:
* Salts: These contain the sulfate ion paired with positively charged ions, such as sodium, magnesium, or ammonium. Many important minerals, like gypsum, barite, and celestite, are naturally occurring sulfate salts.143
* Esters: In these compounds, carbon-containing groups replace the hydrogen atoms of sulfuric acid.1
Sulfuric acid is a strong diprotic acid, meaning it can release two hydrogen ions. This property allows it to form both hydrogen sulfates (HSO4-) and the sulfate ion (SO42-). The sulfate ion is fundamental in various industrial applications, particularly in the production of fertilizers, pigments, and detergents, largely through its role in creating sulfuric acid.45
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