Solubility studies in formamide: II. Solubility product of silver iodate and standard electrode potential of silver—silver iodate electrode in formamide

Abstract

The solubility and solubility product of silver iodate in formamide in sodium perchlorate solutions have been determined at 25, 30 and 35°C. The solubilities in pure formamide are found to be 2.169 × 10 −4, 2.488 × 10 −4, and 2.943 × 10 −4 mole I −1, respectively, at these temperatures, and the corresponding solubility products are 4.609 × 10 −8, 6.053 × 10 −8, and 8.448 × 10 −8 mole 2 1 −2. The standard potential of the Ag (s)/AgIO 3 (s)/IO 3 − electrode has been calculated and found to be 0.2562 V at 25°C. The mean activity coefficients of silver iodate at various rounded molarities of sodium perchlorate solutions, and the standard thermodynamic quantities for the process AgIO 3 (s)åAg + (solvated) + IO 3 − (solvated) have been calculated at these three temperatures.