NaCl is a weaker base than NaOAc. Stronger acids have weaker conjugate bases. HCl is a stronger acid than water.
Strong acids react with strong bases to form weaker acids and bases.
NaOH is a stronger base than NH 3 . Water is a weaker acid than NH 4 Cl. Weaker bases have stronger conjugate acids. NH 3 is a weak base, but its conjugate acid, NH 4 Cl, is a strong acid.