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Citation: SHI Xiao-Bo, LI-Chun Gen, WANG De-Xian. Potentiometrical Judgement of the Complex M(Ⅲ)-M(Ⅱ) Metal Hydroxides[J]. Chinese Journal of Applied Chemistry, ;2002, 19(4): 398-400. shu

Potentiometrical Judgement of the Complex M(Ⅲ)-M(Ⅱ) Metal Hydroxides

1.
College of Chemistry and Biological Sciences, Jiangxi Normal University, Nanchang 330027

Corresponding author: SHI Xiao-Bo,
Received Date: 28 June 2001
Available Online: 6 November 2001
Fund Project: 江西省自然科学基金资助项目(9920007) (9920007)

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(Al³⁺、Fe³⁺、Ni²⁺、Zn ²⁺、Cu²⁺). 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 Ni²⁺ > Zn²⁺ > Cu²⁺.
- complex,
- hydroxide,
- formation
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