hydroxide
OH⁻
Hydroxide is a chemical compound made up of a negatively charged hydroxyl ion (OH-) and a positively charged ion or atom. It can be found in various compounds such as sodium hydroxide (NaOH), potassium hydroxide (KOH) and magnesium hydroxide (Mg(OH)2). Hydroxide ions are highly reactive and are involved in many chemical reactions.
In aqueous solutions, hydroxide ions can neutralize acids, forming water and a salt. This reaction is known as a neutralization reaction. For example, when hydrochloric acid (HCl) is mixed with sodium hydroxide (NaOH), they react to form water (H2O) and sodium chloride (NaCl):
HCl + NaOH → H2O + NaCl
Hydroxide ions can also react with metal ions to form insoluble metal hydroxides. This reaction is used in water treatment to remove heavy metals such as lead, copper, and mercury. Additionally, hydroxide ions can react with certain organic compounds, such as alcohols, to form water and a corresponding organic compound.
In summary, hydroxide is a chemical compound that is highly reactive and involved in many chemical reactions. It is found in various compounds and can neutralize acids, form insoluble metal hydroxides, and react with organic compounds.
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