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  4. How many EDTA (ethylenediamminetetraacetic acid) molecules are required to make an octahedral complex with a Ca 2+ ion?

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Q. How many EDTA (ethylenediamminetetraacetic acid) molecules are required to make an octahedral complex with a $Ca ^{2+}$ ion?

Coordination Compounds

Solution:

$EDTA$ being hexadentate ligand, only one molecule is sufficient to make octahedral complex with $Ca ^{2+}$ ion.