Precipitates

Precipitation reactions Transition metal hydroxides are insoluble in water.If a solution of any soluble transition metal compound is mixed with sodium hydroxide solution then there is displacement reaction. The sodium is the more reactive metal, and displaces the transition metal from its compound. The transition metal hydroxide is produced as a result. As this is insoluble in water it appears as a solid in the liquid. A solid produced in a liquid in this way is called a precipitate.