Answer: produce hydroxide ions
Explanation:
Arrhenius acids are substances which dissociate in water to give hydrogen ions.
For example: [tex]HCl[/tex] is an Arrhenius acid.
[tex]HCl\rightarrow H^++Cl^-[/tex]
Arrhenius bases are substances which dissociate in water to give hydroxide ions.
For example: [tex]NaOH[/tex] is an Arrhenius base.
[tex]NaOH\rightarrow Na^++OH^-[/tex]
An Arrhenius base is best defined as produce hydroxide ions