What is Cobalt(II) hydroxide?
[[File:Cobalt hydroxide.JPG|thumb|right|Blue form of cobalt(II) hydroxide]] '''Cobalt(II) hydroxide''' is a [[chemical compound]]. Its chemical formula is Co(OH)<sub>2</sub>. It contains cobalt in its +2 [[oxidation state]] as an [[ion]]. It also contains [[hydroxide]] ions. It is either reddish or bluish. It is made by reacting a strong [[base (chemistry)|base]] with a cobalt(II) salt. [[Cobalt(II) chloride]] is normally used. This makes the red form. The blue form is made by reacting [[ammonium hydroxide]] with cobalt(II) hydroxide. It turns into [[cobalt(II) oxide]] when heated. It is used to dry paints, to make other cobalt compounds, and as a [[catalyst]]. ==Related pages== *[[Cobalt(II) sulfate]] *[[Cobalt(III) oxide]] *[[Cobalt]] {{chem-stub}} [[Category:Cobalt compounds]]