The solubility of silver chromate in water

Abstract

The solubility of silver chromate in water has been studied between 5 and 80°C. Conductometric, spectrophotometric, tracer, and pH measurements were used to evaluate and confirm the solubility product as 2.76x10^-12±3% at 298 K and                          ΔH⁰ = 93700-0.393T² J (mol Ag₂CrO₄)^-1                          ΔS⁰ = 210-0.79T J K^-1 (mol Ag₂CrO₄)^-1 In contrast to some previous work, particles having approximate dimensions of 0.5 μm were found to have the same solubility as larger crystals. Tracer-level labelling (specific activity 1 and 2mCi (gAg₂CrO₄)^-1 of ^110mAg) with self irradiation for times as long as six months did not change the solubility. The measurements were dependent on the level of illumination.