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COMPLEXING OF ZIRCONIUM AND HAFNIUM WITH DIETHYLENTRIAMINOPENTA-ACETIC ACID

А. Н. Ермаков, I.N. Marov, G.A. Evtikova

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Abstract

The composition and equilibrium constants of zirconium and hafnium complexes with diethylenetriaminepentaacetic acid (H/sub 5/P) were studied using an ion exchange method in a highly acid medium. It was found that five ions of hydrogen break away in the H/sub 5/P reaction with Zr/sup 4+/ and Hf/sup 4+/. The formation constants for ZrP and HfP are equal to (13.8 plus or minus 1.9) x 10/sup 4/ and (4.3 plus or minus 0.3) x 10/sup 4/, respectively. (R.V.J.)

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What this paper is about

The composition and equilibrium constants of zirconium and hafnium complexes with diethylenetriaminepentaacetic acid (H/sub 5/P) were studied using an ion exchange method in a highly acid medium. It was found that five ions of hydrogen break away in the H/sub 5/P reaction with Zr/sup 4+/ and Hf/sup 4+/. The formation constants for ZrP and HfP are equal to (13.8 plus or minus 1.9) x 10/sup 4/ and (4.3 plus or minus 0.3) x 10/sup 4/, respectively. (R.V.J.)

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Available abstract

The composition and equilibrium constants of zirconium and hafnium complexes with diethylenetriaminepentaacetic acid (H/sub 5/P) were studied using an ion exchange method in a highly acid medium. It was found that five ions of hydrogen break away in the H/sub 5/P reaction with Zr/sup 4+/ and Hf/sup 4+/. The formation constants for ZrP and HfP are equal to (13.8 plus or minus 1.9) x 10/sup 4/ and (4.3 plus or minus 0.3) x 10/sup 4/, respectively. (R.V.J.)

Key concepts: Hafnium, Zirconium, Chemistry, Diethylenetriaminepentaacetic acid, Hydrogen, Inorganic chemistry, Ion, Acetic acid

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