Answer
Hypochlorite ion is the stronger base.
Work Step by Step
Acetate ion is the conjugate base of acetic acid, and hypochlorite ion is the conjugate base of hypochlorous acid.
Since: the stronger the base, the weaker the conjugate base, and we know that acetic acid is the stronger acid (higher Ka), we can assume that acetate ion is the weaker base.
Therefore, hypochlorite ion is the stronger base.
