What is Hydroxide?
[[Image:Hydroxide-3D-vdW.png|right|thumb|A space-filling model of a hydroxide ion]] '''Hydroxide''' in [[chemistry]] is a name given to the [[diatomic]] [[anion]] OH<sup>−</sup>, made up of [[oxygen]] and [[hydrogen]] [[atom]]s. Most [[chemical compounds]] that contain hydroxides are [[base (chemistry)|bases]]. An [[Arrhenius base]] is a substance that when [[solvation|dissolved]] in an [[aqueous solution]], it produces hydroxide [[ion]]s. Therefore, hydroxide ions are heavily involved in [[acid-base]] reactions. Many useful chemical reactions or processes involve hydroxide or hydroxide ions. [[Sodium hydroxide]] is used in industry as a strong base, [[potassium hydroxide]] is used in [[agriculture]], and [[iron hydroxide]] minerals such as [[goethite]] and [[limonite]] have been used as iron [[ore]]. The [[aluminium]] ore [[bauxite]] is made mainly out of aluminium hydroxides. Most inorganic hydroxide salts do not dissolve in water. == Uses of hydroxides == Many useful [[chemical]]s and chemical processes involve hydroxides or hydroxide ions. Sodium hydroxide is used in factories as an [[alkali]], potassium hydroxide is used in farming, and iron hydroxide has been used as low grade brown iron ore. ==Examples of hydroxides== *[[Sodium hydroxide]] (NaOH) *[[Potassium hydroxide]] (KOH) *[[Calcium hydroxide]] (Ca(OH)<sub>2</sub>) *[[Ammonium hydroxide]] (NH<sub>4</sub>OH) [[Category:Ions]]