Accession Number : AD0621282

Title :   ON THE HYDROLYSIS OF NIOBATES IN 3M K(CL) MEDIUM,

Corporate Author : ROYAL INST OF TECH STOCKHOLM (SWEDEN) DEPT OF INORGANIC CHEMISTRY

Personal Author(s) : Neumann,Georg

Report Date : 13 JAN 1964

Pagination or Media Count : 3

Abstract : The primary object of the work was to decide whether hexa- or pentaniobates predominate in solution. A series of emf-titrations were carried out in which the total niobium concentration, B, was kept constant whereas the total OH(-)-concentration in excess over Nb(OH)5, --H, was varied. The variation of the activity factors was minimized by adding KCl to the solutions and keeping (K(+)) = 3 M. (OH(-)) was obtained from the emf of the cell --Pt, H2 (1 atm)/ niobate solution S/SE + where SE is the reference electrode. From B, --H and (OH(-)) the average negative charge per Nb atom was obtained as Z = (--H--(OH(-)))/B. (Extracted)

Descriptors :   (*NIOBATES, HYDROLYSIS), (*HYDROLYSIS, MOLECULAR ASSOCIATION), VALENCE, CHEMICAL EQUILIBRIUM, VOLTAGE, VOLUMETRIC ANALYSIS, SOLUTIONS(MIXTURES), POTASSIUM COMPOUNDS, CHLORIDES, IONS, SWEDEN

Distribution Statement : APPROVED FOR PUBLIC RELEASE