ZÁSADY KYSELINY TVRDÉ H[2]O, HO^-, F^-, Cl^- ^ CH[3]COO^-, SO[4]^2-, NO[3]^- ClO[4]^-, CO[3]^2-, ROH, R[2]O, NH[3], RNH[2] H^+, Li^+, Na^+, K^+, Al^3+, Fe^3+ AlCl[3], BF[3], (RO)[3]B R[3]C^+, RCO^+, NC^+ MĚKKÉ RSH, RS^-, R[2]S I^-, SCN^-, S[2]O[3]^2- R[3]P, (RO)[3]P, CN^-, RNC, alkeny benzen, H^-, R^- Cu^+, Ag^+, Hg^+ CH[3]Hg^+, BH[3] RS^+, I^+, Br^+ I[2], Br[2] chinony, karbeny, kovy