Abstract
A spectrophotometric study of silver(II) in sulphuric acid solution indicates the formation of two sulphate complexes, in the range 4–18 M H 2SO 4, with absorbance peak maxima at 361 and 260 mμ, respectively. In 15 M H 2SO 4 the molar absorptivity of silver(II) is 3.11 × 10 4 at 361 mμ. Kinetic studies of the reduction of silver(II) by the solvent suggest a rate-determining step first order in silver(II) and yield a pseudo first-order rate constant of 1.9 × 10 −1min −1. Further studies as a function of H 2SO 4 concentration show that the specific decomposition rate of the two complexes is identical and that changes in H 2SO 4 concentration only serve to shift the concentration equilibrium between the two complexes.
Published Version
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