Fecl3 cucl2 crcl3 плюс щелочи. срочноо
FeCl3 + 3NaOH -> Fe(OH)3 + 3NaCl CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl CrCl3 + 3NaOH -> Cr(OH)3 + 3NaCl