EDTA A Very Powerful Chelating Agent

It is also possible that the formed chelates are mixed metal-EDTA—(or other ligand) chelates, such as, for example, in the cases of the following compounds [M(OH)Y], [M(H)Y], and so forth. Another example of a mixed complex is provided by the aquo-cobalt(lll)-EDTA complex, whose structure is seen in Fig. 28.2. 

Most values are high, even sometimes very high. This is not surprising. In these complexes we can see that all the factors that, according to Schwarzenbach, govern 

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