Discussion Forum

EDTA^4-   is an ethylenediaminetetraacetate ion. The total number of N-Co-O  bond angles in [Co(EDTA)]^- complexion is 

Answer:

Explanation:

Plan EDTA  is a multidentate ligand as it can donate six pairs of electrons -two pair from the two nitrogen atoms and four pair  from the dour  terminal oxygens of the -COO^-  groups 

The structure of a chelate of a divalent Co²⁺ with EDTA is shown as

 Each M has four N-Co-O bonds thus total of eight N-Co-O bonds