2-(N-Morpholino)ethanesulfonic has only 1 acidic (or ionizable) hydrogen Similarly, NaOH has 1 OH- ion, basic grp (50) * (0.02) = (0.099)*(mL of NaOH) => NaOH reqd = 10.10 mL (ans) Solution 2-(N-Morpholino)ethanesulfonic has only 1 acidic (or ionizable) hydrogen Similarly, NaOH has 1 OH- ion, basic grp (50) * (0.02) = (0.099)*(mL of NaOH) => NaOH reqd = 10.10 mL (ans).