Studies on metal complexes in aqueous solution …- II

Measurements are reported of the solubilities of calcium iodate and copper iodate in buffered solutions of sodium malonate and potassium hydrogen phthalate. Thermodynamic association constants are determined for the formation of the species CaPh, CuPh, CuHPh + at 25°, 30°, 35°, 40° and 45°C and of the species Ca Mal , Cu Mal , CuH Mal + at 25°, 30°, 35° and 40°C. Δ H °, Δ G °, δ S ° are calculated for the formation reactions of these complexes and hydration entropies of the complexes are also derived.