Write a chemical equation for ba(oh )2 (aq) showing how it is an acid or a base according to the arrhenius definition.

Balanced chemical reaction: Ba(OH)₂(aq) → Ba²⁺(aq) + 2OH⁻(aq).
According to the Arrhenius definition barium hydroxide is base.
According this theory acids are substances which produce hydrogen ions in water solution, bases are substances which produce hydroxide ions in solution. Acids and bases when react (neutralisation) produce salt and water.

Which metal is less dense