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□□□□aaaaaaaaDDDDDDDDDDDDDD[IZZIIZZII1DDDFe2+ClDFe2+DDDFe3+DDDDD2a(II)DDaaaaDDKSCNDDDDDD(IIaaaaaaa[Fe(SCN)]3-nDDDDDDn)□aaaaaaaaFe3++nSCN-二[Fe(SCN)]3-n(n=l~6naaaaaKSCNDDD)(IIaaaCI2aaaa)□aaaaaaaa(NH)Fe(42(IISO)aa42)□aaaaa-DDDDDDDDDDDDDaaaaaaaaaFe2+DDDDDDDDDaaaaaaaaFe(OH)DDDDFe(OH)DDD22aaaaaaaaaDDDDDDDDDDDDDaaaaaaaaFe(OH)DDDDDDaaa3Fe2+dDaaaaDDDDDDDDDDDDDaaaaaaaaaaaaFe(OH)・2Fe(OH)DD23aaaaaaamL6molL-iaaaaFe2++2OH-二 Fe(OH)(DD)2DNaOHDaaaa4Fe(OH)+O+2HO=4Fe(OH)2223aaaaaaaaIZZIIZZIIZZIIZZIIZZIaaaaaaaaaC02+Dciaaaaa2(II)DDaaaaaaaaaaaaaaC\1I—1+IZZIOIZZIOIZZIIZZIaaaa
DDDDDNaOHDDDCoCiaa2NaOHDDDDDDDDDD-DDDDDDDDDDDDDDDDaaaaCo(O