The transition metal complex ion [Co(EDTA)]2−[\text{Co}(\text{EDTA})]^{2-}[Co(EDTA)]2− is formed when cobalt(II) ions react with the polydentate ligand ethylenediaminetetraacetate (EDTA4−{\text{EDTA}}^{4-}EDTA4−).
Which of the following correctly describes the number of dative covalent bonds formed by a single EDTA4−{\text{EDTA}}^{4-}EDTA4− ligand to the central metal ion, and the identity of the donor atoms?
4 dative covalent bonds, arising from lone pair donation by four oxygen atoms
6 dative covalent bonds, arising from lone pair donation by two nitrogen atoms and four oxygen atoms
6 dative covalent bonds, arising from lone pair donation by four nitrogen atoms and two oxygen atoms
2 dative covalent bonds, arising from lone pair donation by two nitrogen atoms
48 exam-style questions on OCR A A Level Chemistry Transition elements. Each one has a worked solution and a mark scheme showing where the marks go.