The Extraction Equilibrium and the HSAB Rule

Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (1): 22.

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The Extraction Equilibrium and the HSAB Rule

YANG Tian-Lin¹, YANG Yong-Hui², SUN Si-Xiu², SONG Qi-Sheng², SUN Xuan²

1. Department of Chemistry, Ningxia University, Yinchuan, 750021;
2. Department of Chemistry, Shandong University, Jinan, 250100

Received:1997-10-28 Online:1999-01-24 Published:1999-01-24

Abstract

Abstract: The extraction equilibrium of Fe(Ⅲ), Be(Ⅱ), Mn(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ), Zn(Ⅱ), Pb(Ⅱ)and Cd(Ⅱ)from nit rate medium with di-(2-et hylhexyl)pHospHoric acid (HDEHP)in kerosene were st udied at(298±1)K.The correlation between The extraction equi-librium constants of Metalions and The HSAB rule was discussed.The experimental results indi-cate that Their K_exand ΔG ○ are increasing with The increase of hardness of Lewis acid.

Key words: Di2(2-et hylhexyl)phosphoric acid, Extraction equilibrium, Rule of hard and soft acids and bases(HSAB), Metalions

CLC Number:

O658.2

TrendMD:

YANG Tian-Lin, YANG Yong-Hui, SUN Si-Xiu, SONG Qi-Sheng, SUN Xuan . The Extraction Equilibrium and the HSAB Rule[J]. Chem. J. Chinese Universities, 1999, 20(1): 22.

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The Extraction Equilibrium and the HSAB Rule

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