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Question

How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?


A
Two
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B
Six
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C
Three
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D
One
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Solution

The correct option is A One
EDTA is a hexadentate ligand. It has 6 donor atoms. These six donor atoms form octahedral environment around central metal atom.
Hence, one molecule of EDTA is required to form an octahedral complex with Ca2+ ion.

Option D is correct.

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