Cu(OH)₂, or copper(II) hydroxide, is generally considered insoluble in water. This means that when you add Cu(OH)₂ to water, it does not dissolve to form a clear solution.
The reason for this insolubility lies in the nature of the compound itself. Cu(OH)₂ has a strong ionic structure due to the presence of copper ions (Cu²⁺) and hydroxide ions (OH⁻). In water, these ions have a tendency to form a solid precipitate rather than remaining dissolved. The solubility product constant (Ksp) of Cu(OH)₂ is quite low, indicating that the amount of Cu(OH)₂ that can dissolve in water is very minimal.
Moreover, when Cu(OH)₂ is mixed with water, it often settles at the bottom of the container as a blue solid, confirming its insoluble nature. This characteristic aligns with other metal hydroxides, especially those of transition metals, which typically exhibit low solubility in water.