混合金属离子溶液中形成复合氢氧化物的研究  

Study on the Formation of Complex Hydroxides from Mixed Metal Ions Solutions

作　　者：石晓波[1] 王赛英[1] 李春根[1] 汪德先[1] 

机构地区：[1]江西师范大学化学系,江西南昌330027

出　　处：《江西师范大学学报（自然科学版）》1999年第3期243-247,共5页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：江西省自然科学基金

摘　　要：采用电位滴定法对Ⅲ价～Ⅱ价混合金属离子(Al3+、Fe3+、Ni2+、Zn2+、Cu2+)水溶液加碱形成复合氢氧化物进行了研究.结果发现,所研究的M3+～M2+混合体系均能形成复合氢氧化物,并且复合氢氧化物沉淀时的pH值低于单一金属离子析出M(OH)2沉淀时的pH值,这种pH值差别越大,越易形成复合氢氧化物,即形成复合的顺序是:Ni2+>Zn2+>Cu2+.In this paper,potentiometric titration method was applied to judge whether precipitated hydroxide is a complex hydroxide or a mixture when alkali solution was added to an aqueous solution contraining two kinds of metal salts(Al 3+ 、Fe 3+ 、Ni 3+ 、Zn 2+ 、Cu 2+ ).Capability of complex formation between the metal hydroxides was invastigated by comparing the pH of the plateau in the titration curves with that for the solution of a kind of metal ion.Complex was formed far all of the combination between divalent ion and trivalent ions,and the sequence of the capability was Ni 2+ >Zn 2+ >Cu 2+ .

关 键 词：电位滴定法 复合体 氢氧化物 金属离子溶液 

分 类 号：O611.64[理学—无机化学]