STUDY OF THE SOLUBILITY AND DETERMINATION OF THE SOLUBILITY PRODUCT OF COPPER AND SILVER SELENITES

The solubility products of selenites of copper and silver were determi ned. The solubility of the compounds was determined by stirring the de position in diluted acids, whose anions did not participate in the com plex formation with copper or silver. After separation, a part of the solution was used for pH-measurements and another one for determining the concentration of copper and silver ions by means of ion-selective electrodes. The anion concentration was expressed by the concentration of the metal cation. The values of the relative standard deviations f or each series indicates a good reproducibility of the results. It was established that the solubility products of CuSeO3 is 1.50 . 10(-11) and for Ag2SeO3 1.72 . 10(-16).