Baze tari: sunt bazele metalelor din grupele I si IILiOH, NaOH, KOH, RbOH, CsOH, Ca(OH)2, Sr(OH)2, Ba(OH)2Baze putin mai slabe decat cele de mai sus, sunt totusi: Be(OH)2 si Mg(OH)2TARIA ACIZILOR SI BAZELORacidKabazCrestetariaacidului de jos in sus in tabel(sus e cel mai tare acid)HI1011Crestetariabazei de sus in josHClO4acid percloric1010ClO4-HBr109HCl107Cl-H2SO4103HSO4-HNO32,1101H3O+1H2OH2SO31,5x10-2HSO3-HSO4-1x10-2SO42-H3PO47.5 x10-3HFacid slab6.8x10-4F-HNO24.7x10-4HCOOHacid formic (metanoic)1,810-4CH3COOHacid acetic (etanoic)1.75x10-5CH3COO-H2CO34.3x10-7H2S9.5x10-8HS-H2PO4-6.2x10-8NH4+5.7x10-10NH3HCN4.9x10-10C6H5OH - fenol1,310-10HCO3-4.7x10-11CO32-HPO42-4.8x10-13H2O10-14HO-