IONIC SPECIES IN CERIC PERCHLORATE SOLUTIONS

Abstract

Ceric ion has been shown to exist in perchloric acid solution as a mixture of Ce 4+ , CeOH 3+ , and a dimer, probably (Ce-O-Ce) 6+ . From a spectral study between 395 and 430 mμ, the values of the equilibrium ratios have been determined, along with the molar extinction coefficients of each ion over this region of wave length. The thermodynamic quantities ΔH, ΔF°, and ΔS° have been determined for each reaction.