Bas Formel Baskonstant $K_b(mol/dm^3)$ $pK_b$ Väteoxalatjon $HC_2O^-_4$ $1,7\cdot 10^{-13}$ $12,77$ Vätesulfitjon $HSO^-_3$ $6,7\cdot 10^{-13}$ $12,17$ Sulfatjon $SO^{2-}_4$ $1,0\cdot 10^{-12}$ $12,00$ Divätefosfatjon $H_2PO^-_4$ $1,3\cdot 10^{-12}$ $11,89$ Nitritjon $NO^-_2$ $2,1\cdot 10^{-11}$ $10,68$ Fluoridjon $F^-$ $2,8\cdot 10^{-11}$ $10,55$ Formiatjon $HCOO^-$ $5,6\cdot 10^{-11}$ $10,25$ Bensoatjon $C_6H_5COO^-$ $1,5\cdot 10^{-10}$ $9,82$ Oxalatjon $C_2O^{2-}_4$ $1,9\cdot 10^{-10}$ $9,72$ Acetatjon $CH_3COO^-$ $5,7\cdot 10^{-10}$ $9,24$ Propanoatjon $C_2H_5COO^-$ $7,5\cdot 10^{-10}$ $9,12$ Pentaakvahydroxoaluminiumjon $Al(OH)(H_2O)^{2+}_5$ $1,0\cdot 10^{-9}$ $9,00$ Vätekarbonatjon $HCO^-_3$ $2,2\cdot 10^{-8}$ $7,66$ Vätesulfidjon $HS^-$ $1,1\cdot 10^{-7}$ $6,69$ Sulfitjon $SO^{2-}_3$ $1,6\cdot 10^{-7}$ $6,80$ Vätefosfatjon $HPO^{2-}_4$ $1,6\cdot 10^{-7}$ $6,80$ Diväteboratjon $H_2BO^-_3$ $1,7\cdot 10^{-5}$ $4,77$ Ammoniak $NH_3$ $1,8\cdot 10^{-5}$ $4,74$ Cyanidjon $CN^-$ $2,0\cdot 10^{-5}$ $4,70$ Karbonatjon $CO^{2-}_3$ $2,1\cdot 10^{-4}$ $3,68$ Väteperoxidjon $HO^-_2$ $4,2\cdot 10^{-3}$ $2,38$ Fosfatjon $PO^{3-}_4$ $2,3\cdot 10^{-2}$ $1,64$ Sulfidjon $S^{2-}$ $8,3\cdot 10^{-2}$ $1,08$