Multiple choice Which of the following is a Bronsted-Lowry base, but not an Arrhenius base? NaOH NH3 Ca(OH)2 KOH Reveal answer Fill a bubble to check yourself B Correct answer Explanation Arrhenius bases furnish OH- ions in their aqueous solutions. Bronsted-Lowry bases are proton acceptors. NH3 will not release OH- ions, but accept a proton to form NH4+. Hence, NH3 is a Bronsted-Lowry base, but not an Arrhenius base.