Final answer:
Ca(OH)₂ is classified as a strong base because it is a hydroxide of the alkaline earth metal calcium and dissociates completely in aqueous solutions.
Step-by-step explanation:
Ca(OH)₂ is a compound that consists of calcium ions (Ca²+) and hydroxide ions (OH⁻). It is a substance that will dissolve in water to yield hydroxide ions, which is a characteristic of bases. Given that it is a hydroxide of the alkaline earth metal calcium, Ca(OH)₂ falls into the category of ionic compounds that contain hydroxide ions and dissociate completely in aqueous solutions to yield their respective metal cation and hydroxide ions. Therefore, Ca(OH)₂ is a strong base.