Determination of the Stability Constants of Complexes of Zr(Ⅳ) and UO²⁺₂ With Acetohydroxamate

An investigation was made on the formation of complexes between acetohydroxamic acid and UO²⁺₂,Zr(Ⅳ) ions. The stability constants of the complexes of zirconium ion and uranyl ion with acetohydroxamic acid were determined by using the distribution method and the pHpotentiometric method respectively. The values of the stepwise stability constant thus obtained are the following: β₁(Zr(Ⅳ))=(6.7±0.1)×10¹³， β₂(Zr(Ⅳ)) =(1.8±0.1)×10²⁵， β₃(Zr(Ⅳ))=(3.8±0.3)×10³⁵； β₁(UO²⁺₂)=(8.6±0.4)×10⁷， β₂(UO²⁺₂)=(3.8±0.1)×10¹⁴.