Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Ba(OH)2 is a chemical formula for barium hydroxide, which is an alkaline earth metal hydroxide. It consists of one barium ion (Ba2+) and two hydroxide ions (OH-) combined together.
Related terms
Alkaline earth metal hydroxides: These are compounds formed by combining alkaline earth metals (like barium, calcium, magnesium) with hydroxide ions (OH-). They are typically strong bases that can readily release OH- ions in water.
Strong base: A strong base is a substance that easily donates OH- ions in water. It dissociates almost completely into its constituent ions and has a high concentration of OH-. Examples include sodium hydroxide (NaOH) and potassium hydroxide (KOH).
Weak base: Unlike strong bases, weak bases do not fully dissociate in water to release OH- ions. They have a lower concentration of OH-. Ammonia (NH3) is an example of a weak base.