MHT CET · Chemistry · Coordination Compounds
Find the total number of moles of donor atoms present in one mole trioxalatocobaltate(III) ion.
- A 6
- B 3
- C 12
- D 4
Answer & Solution
Correct Answer
(A) 6
Step-by-step Solution
Detailed explanation
In \(\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}\), three oxalate ligands are attached to the cobalt ion. Since oxalate is a bidentate ligand, each \(\left(\mathrm{C}_2 \mathrm{O}_4\right)^{2-}\) has two donor oxygen atoms.
1 mole of \(\left(\mathrm{C}_2 \mathrm{O}_4\right)^{2-} \equiv 2\) moles of donor atoms.
\(\therefore 1\) mole of \(\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-} \equiv 3 \times 2=6\) moles of donor atoms.
1 mole of \(\left(\mathrm{C}_2 \mathrm{O}_4\right)^{2-} \equiv 2\) moles of donor atoms.
\(\therefore 1\) mole of \(\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-} \equiv 3 \times 2=6\) moles of donor atoms.
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