→Cr3+I2+H2O HaS Cr3+S↓+H2O H2SO3 C 3++SO 2 Cro2+Ht Felt Cr3++ Fe Cr3++ Cl NO2 Crt+ No Cr20,+C2H5OH Cr++ CH3COOH 8.3.3铬的难嵱盐 g Ag2CrO4砖红 H Cr2O2+Ba2+→| AcRo4黄 Agt+ Cr, 0,2 Pb2+ PbCro黄Cr2O7 2－+H+ I－ H2S H2SO3 Fe2+ Cl－ NO2 － Cr3++ I2 + H2O Cr3++ S↓+ H2O Cr3+ + SO4 2－ Cr3+ + Fe3+ Cr3+ + Cl2 Cr3+ + NO3 － Cr2O7 2－+ C2H5OH → Cr3+ + CH3COOH 8.3.3 铬的难溶盐 Ag+ Cr2O7 2－ + Ba2+ → Pb2+ Ag2CrO4↓砖红 BaCrO4↓黄 PbCrO4↓黄 H+ Ag+ + Cr2O7 2－