Collect. Czech. Chem. Commun. 1986, 51, 2741-2750

Preparation of potassium selenites, their solubility and bonding conditions

Zdeněk Mička, Miroslav Ebert and Pavel Ptáček

Department of Inorganic Chemistry, Charles University, 128 40 Prague 2


The solubility diagrams of a K2SeO3-H2SeO3-H2O system were studied at 293 and 303 K for the first time. The effect of temperature on the character of the studied system from the point of view of the transition from hydrogenselenite to diselenite was studied. The results were used to refine the preparation conditions for K5H3(SeO3)4, KHSeO3, KH3(SeO3)2, and K2Se2O5. The compounds obtained were studied using thermoanalytical methods and infrared spectroscopy. The behaviour of protons in the hydrogen bonds of the acid salts was described.