How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca^2+ ion?
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?
(a) Six
(b) Three
(c) One
(d) Two.
4 views
1 Answers
(c) : EDTA, which has four donor oxygen atoms and two donor nitrogen atoms in each molecule forms complex with Ca2+ ion. The free acid H4 EDTA is insoluble and the disodium salt Na2H2 EDTA is the most used reagent.
Ca2+ + [H2EDTA]2– → [Ca(EDTA)]2– + 2H+
4 views
Answered