论文部分内容阅读
Potentiometric titration method was used to judge whether the precipitated hydroxide is a complex hydroxide or a mixture when alkali solution was added to an aqueous solution containing two kinds of metal salts(Al 3+ ?Fe 3+ ?Ni 2+ ?Zn 2+ ?Cu 2+ ). Capability of complex formation between the metal hydroxides was investigated by comparing the pH of the plateau in the titration curves with that for the solution of one metal ion. Complex hydroxide was formed for all divalent ions and trivalent ions, and the sequence of the capability was Ni 2+ >Zn 2+ >Cu 2+ .
Potentiometric titration method was used to judge whether the precipitated hydroxide is a complex hydroxide or a mixture when alkali solution was added to an aqueous solution containing two kinds of metal salts (Al 3+? Fe 3+? Ni 2+? Zn 2+? Cu 2+). Capability of complex formation between the metal hydroxides was investigated by comparing the pH of the plateau in the titration curves with that for the solution of one metal ion. Complex hydroxide was formed for all divalent ions and trivalent ions, and the sequence of the capability was Ni 2+> Zn 2+> Cu 2+.