ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

The specific electric conductivity in the liquid phase of the system K₂HPO₃-H₃PO₃-H₂O

M. Ebert and J. Čipera

Karlsuniversität, Praha

Abstract: The liquid phase of the system K₂HPO_3-H₃PO₃-H₂O was studied for the first time with the method of the sp. elec. cond. at the concns. 0.05, 0.1 and 0.5M and 25°, 35°, and 45°. By the analyses of the isotherm deviations of the sp. elec. cond. from the additive values, it was detd. that in addn. to KH₂PO₃, the salts KH₅P₂O₆ and K₂H₇P₃O₉ exist in aq. solns. just the same as in the solid phase. With these salts the unknown KH₈P₃O₉ salt was detd. The formation of these 3 salts is increased with increasing concns. with a negligible effect of temp. at 25-45°. At the same concn. and temp. conditions, the greatest deviation of the sp. elec. cond. from the additive values is shown by KH₅P₂O₆ which is most stable. It is followed by KH₈P₃O₉ and K₂H₇P₃O₉ which is the least stable.

Full paper in Portable Document Format: 199a679.pdf (in Czech)

Chemical Papers 19 (9) 679–683 (1965)