1、 L EB BV = FeaCoaNi “S “S kig=NMaa NMaa b / ? “S NMaa 3#b X “S ! 3-% aM L Y L z8b B H 3 H = L1 1aM a a 2aM a a 3a 3 a 4 Maa # 3 ZE La Ua ? L BaM a a # T C d#Z T 1aM (1) 0.5mLCl2 +3d 6 molL-1H2SO4 (NH4)2Fe(SO4)2KSCN Cl2 + 2Fe2+“ 2Fe3+ + 2 Cl Fe3+ + SCN“ Fe(SCN)2+lFe(SCN)63 B“ (2) a 2 mLH2O + 3d 6 mol
2、L-1H2SO4 (NH4)2Fe(SO4)28 3 mL 6 molL-1NaOH 5 NaOH (NH4)2Fe(SO4)2 A*5 NaOHb 5 1E b A P Fe2+Fe3+b 2a (1) CoCl2Cl2 AC A Co2b a V$ b Co(OH)3(2) CoCl2 NaOH b /Cl2 b5 F Cl25 Co2+ + 2OH“ Co(OH)2 ( b b ) 4Co(OH)2+O2+2H2O“ 4Co(OH)3 2Co(OH)2+Cl2+2H2O“ 2Co(OH)3+2Cl+2H+1a (1) NiSO4Cl2 AC NiSO4 Cl2Q (1) NiSO4 Na
3、OH b Cl2 s bM Ni(OH)2$ b O2 . s 2 Ni(OH)2+Cl2+2H2O“ 2Ni(OH)3+2Cl+2H+=aM a a Fe(OH)3 KIx k M Fe(OH)3 +3HCl“ FeCl3+3H2O Co(OH)3 KIx kM (1) HCl(i)Q KIx k Ni(OH)3 KIx kM 2Ni(OH)3+6HCl“ 2NiCl2+Cl2+ 6H2O (2)FeCl3+KICCl4CCl4 , 2Fe3+2I“ 2Fe2+I2 B (1) a +2 +3 A ?ib (2) OH 3M? p a 3 # T C d#Z T K4Fe(CN)6+I2 (
4、NH4)2Fe(SO4)2 (M ) Fe2+kQ 2Fe(CN)64-+ I2 = 2Fe(CN)63-+2I- KSCN AM Fe2+ I2 SCN- Fe2+ (NH4)2Fe(SO4)2 I2 KSCN + H2O2 Fe3+kQFe2+ + H2O2Fe3+n=1-6 B“ I5 Fe(CN)62-? I27 Fe2+ I2y 3 b E9=0.535 V E9=0.771 V E9=0.358 V FeCl3 + K4Fe(CN)6 (M ) Fe3+kQ M FeCl3 + i V 5 CoCl2 + KSCN%8 ? Y %8 M / M Co(SCN)42 V 4 k Co
5、2+ Co2+4SCN“ Co(SCN)42 s CoCl2 + i 5 A Co(NH3)62+ b $ 2 molL-1NaOH s 1 molL-H2SO4 AM H2O d AM NiSO4+ V 6 molL-1 zF m s Ni(NH3)62+ b $b F aa? 3M Ni(NH3)62+# Co(NH3)62+Ni(NH3)62+ b $b Co(NH3)62+ b $ Co(NH3)43+1 Co(NH3)62+b 5) 1a 2as Fe3+ Fe(OH)3Cr3+V Cr(OH)3 NaOH ACrO2Ni2+ A Ni(NH3)62+ Fe(OH)33a9 (1 ) : (2) a +2 +3 A ?ib (3) OH 3M? p (4) 4aAa(NH4)2Fe(SO4) 6H2O BaNH4+aFe2+aSO42 CaFe(OH)2 DaNH3 EaKMnO4 FaFe3+GaFe4Fe(CN)63HaBaSO4
