Which type of ligand is EDTA?

Step-by-step solution

EDTA stands for Ethylenediaminetetraacetate ion. It has the chemical formula (OOCCH₂)₂NCH₂CH₂N(CH₂COO)₂⁴⁻ . The structure contains four oxygen atoms from the carboxylate groups and two nitrogen atoms from the amine groups that can act as donor sites. Since it has six donor atoms capable of forming coordinate bonds with a central metal ion simultaneously, it is classified as a hexadentate ligand. Answer: Hexadentate