Explanation:
Arrhenius base are defined as the specie which when dissolved in water dissociate to give hydroxide ions.
For example, [tex]Sr(OH)_{2}[/tex] being an ionic compound when dissolved in water will give [tex]Sr^{2+}[/tex] and [tex]OH^{-}[/tex] ions.
On the other hand, Arrhenius acids are the species which when dissolved in water will dissociate to give hydrogen ions into the solution.
For example, [tex]HCl \rightarrow H^{+} + Cl^{-}[/tex]
As HCl is dissociating in water to give hydrogen ions. Hence, it is an acid.
