Determination of Mo(VI)¯Zr(IV) interaction parameters in highly acidic solutions by UV absorbance spectrophotometry

Molybdenum(VI)¯zirconium(IV) systems were studied by UV spectrophotometry in 0.5 ¯3 M HClO4 media, revealing the existence of a complex between the two species. Within the experimental domain (2 M<[HClO4]<3 M, [Mo(VI)]<10-2 M, [Zr(IV)]<10-2 M) a complex with 1:1 stoichiometry is formed with a conditional constant of approximately 200 at 25°C.