The solubility of strontium carbonate in water

Values have been determined for the solubility of SrCO3 in water, by use of both radiometric and flame emission spectrophotometric methods. The two methods gave essentially identical results. For water free from atmospheric CO2 the solubilities/mg I–1 were 5·34 ± 0·014 at 5 °C, 6·94 ± 0·018 at 15 °C, and 8·95 ± 0·029 at 25 °C. For water in equilibrium with the atmosphere at 25 °C the solubility was 42·7 ± 0·048 mg l–1. These results agree satisfactorily with calculated values based on a dissociation constant for SrCO3 of 10–9·15 at 25 °C, which can be derived from data on standard free energies of formation.