How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with Ca2+?
A
six
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B
three
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C
one
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D
two
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Solution
The correct option is A one An octahedral complex has 6 bonds around the central atom . One EDTA moledule complexes with one molecule of calcium cation to form octahedral complex.