Cobalt aqueous trivalent

Where activities of solid species are unequal, a conditional equilibrium constant could be applied, as noted in the derivation of Equations 5 and 6. Aqueous trivalent cobalt is not thermodynamically stable in the pH range of interest here. 

Experiment 2 Molar Conductivity Measurements Considering Arrhenius s electrolytic theory of dissociation, Werner noted that evidence for his coordination theory may be obtained by determining the electrolytic conductivity of the metal complexes in solution. Werner and Jprgensen assumed that acid (ionic) residues bound directly to the metal would not dissociate and would thus behave as nonconductors, while those loosely held would be conductors. Molar conductivities of 0.1 molar percent aqueous solutions of some tetravalent platinum and trivalent cobalt ammines are given in Table 2.3. 

Complexes of pyridine-2-carboxylic acid (picolinic add, picH) and its substituted derivatives commonly exhibit the N—O bidentate nature of this aromatic amino add. From aqueous solutions chelates are obtained with the coordinated carboxylic group deprotonated, or neutral ligand forms may be isolated from non-aqueous media. Bis chelates are common in either case with bivalent metal ions. The tris chelates of trivalent cobalt and manganese have been structurally characterized recently. The latter is tetragonally distorted in a structure similar to Mn (oxine)j. 

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