Editing Cobalt(II) chloride (section)

===Solutions===
Cobalt chloride is fairly [[Solubility|soluble]] in water.  Under atmospheric pressure, the [[mass concentration (chemistry)|mass concentration]] of a [[saturated solution]] of {{chem|CoCl|2}} in water is about 54% at the boiling point, 120.2&nbsp;°C; 48% at 51.25&nbsp;°C; 35% at 25&nbsp;°C; 33% at 0&nbsp;°C; and 29% at −27.8&nbsp;°C.<ref name=saugier/>

Diluted [[aqueous]] solutions of {{chem|CoCl|2}} contain the species {{chem|[|Co|(|H|2|O|)|6|]|2+}}, besides [[chloride]] ions.  Concentrated solutions are red at room temperature but become blue at higher temperatures.<ref>''The Merck Index'', 7th edition, Merck & Co, Rahway, New Jersey, USA, 1960.</ref>