How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?
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a
One
b
Two
c
Six
d
Three
answer is A.
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Detailed Solution
EDTA is hexadentate (four donor O atoms and 2 donor N atoms and for the formation of octahedral complex one molecule is required Ca+++[H2EDTA−]→[Ca(EDTA)]2−+2H+ Anti > Gauche > Eclipse