Bases insolubles Cu(OH)2-Fe(OH)3-Cr(OH)2-CuOH-Zn(OH)2-Al(OH)3-Pb(OH)2 Base Instable NH4OH-(NH3H2O) Chlorure Insoluble AgCl-PbCl2-CuCl-HgCl Sulfate Insoluble PbSO4-SrSO4-BaSO4 Carbone Insoluble LiCO3-KCO3-NACO3-(NH4)2CO3 Sulfure Insoluble Li2S-K2S-Na2S-