Which of the following statement(s) is( are) true?

a. The coordination number of a metal ion in an octahedral complex ion is 8.

b. All tetrahedral complex ions are low-spin.

c. The formula for triaquatrianuninechromiwn(III) sulfate is [Cr(H₂O)₃(NH₃)](SO₄)₃.

d. The electron configuration of Hf²⁺ is [Xe]4f¹²6s².

e. Hemoglobin contains Fe³⁺.

Interpretation: The correct statements from the given statements are to be identified.

Concept introduction: The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The authenticity of the given statement, “The coordination number of a metal ion in an octahedral complex is 8”.

Explanation

The given statement is “The coordination number of a metal ion in an octahedral complex is 8”...

Interpretation: The correct statements from the given statements are to be identified.

Concept introduction: The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The authenticity of the given statement, “All tetrahedral complexes are low-spin”.

Interpretation: The correct statements from the given statements are to be identified.

Concept introduction: The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The authenticity of the given statement, “The formula for triaquatriamminechromium(III) sulfate is [Cr(H2O)(NH3)]2(SO4)3 ”.

Interpretation: The correct statements from the given statements are to be identified.

Concept introduction: The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The authenticity of the given statement, “The electronic configuration of Hf+2 is [Xe]4f126s2 ”.

Interpretation: The correct statements from the given statements are to be identified.

Concept introduction: The electrons in the d orbital of a transition metal split into high and low energy orbitals when ligands are attached to it. The energy difference between these two levels depends upon the properties of both metal and the ligands. If the ligand is strong, then splitting will be high and the complex will be low spin. If the ligand is weak, then splitting will be less and the complex will be high spin.

To determine: The authenticity of the given statement, “Hemoglobin contains Fe+3 ”.

The given statement is incorrect.