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9-46 ÓûÓÃ100 mL°±Ë®Èܽâ 0.717 g AgCl(Ïà¶Ô·Ö×ÓÖÊÁ¿Îª143.4)£¬Çó°±Ë®µÄԭʼŨ¶ÈÖÁÉÙΪ¶àÉÙ(mol¡¤L-1)? (KÎÈ(Ag(NH3)2+) =1.1 ? 107£»Ksp(AgCl) =1.8 ? 10-10 ) 9-47 AuÈÜÓÚÍõË®£¬Éú³ÉAuCl?4ºÍNO¡£

? (1) ÅäƽÀë×Ó·´Ó¦·½³Ìʽ£ºAu +NO3+ Cl????AuCl?4 + NO

(2) ÒÑÖª Au3+ + 3e? Au3+ + 4Cl?

? 4H+ +NO3+ 3e?

Au ?? = 1.500 V

25

AuCl?4 KÎÈ = 2.65 ? 10

NO + 2H2O ù£ ??= 0.957 V

¼ÆËã·´Ó¦µÄK?¡£ 9-48£® ÒÑÖªÏÂÁÐÊý¾Ý£º Co3+ + e? = Co2+

??= 1.92 V

4? Co2+ + 6CN? = Co(CN)6 KÎÈ=1.00 ? 1019

64? Co3+ + 6CN? = Co(CN)36 KÎÈ=1.00 ? 10

6

O2 + 2H2O + 4e? = 4OH-

??= 0.402 V

?4???

(1) ÇóCo(CN)3Öµ£» 6+ e = Co(CN)6µÄ?4?(2) ÌÖÂÛCo(CN)6ÔÚ¿ÕÆøÖеÄÎȶ¨ÐÔ¡£

7