Question 1

In the following pair of complex ions, choose the one that absorbs light at a longer wavelength.

Accepted Answer

A) [Co(H2O)6]2+   
B) [Co(NH3)6]2+ 
A) [Co(H2O)6]2+   
B) [Co(NH3)6]2+ A

Question 2

Draw and label the geometric isomers of [CrF2Cl4]3-?

Accepted Answer

Question 3

Predict the number of unpaired electrons in the [CrCl6]4- ion.

Accepted Answer

4

Question 4

Predict the number of unpaired electrons in the [Fe(CN)6]3- ion.

Accepted Answer

Question 5

Labile complexes are coordination complexes that

Accepted Answer

A) are labeled with a radioactive isotope. 
B) are thermodynamically stable. 
C) are thermodynamically unstable. 
D) undergo rapid ligand exchange reactions. 
E) undergo very slow ligand exchange reactions. 
A) are labeled with a radioactive isotope. 
B) are thermodynamically stable. 
C) are thermodynamically unstable. 
D) undergo rapid ligand exchange reactions. 
E) undergo very slow ligand exchange reactions.

Question 6

The ion [Co(NH3)6]2+ is octahedral and high spin. This complex is

Accepted Answer

A) paramagnetic, with 1 unpaired electron. 
B) paramagnetic, with 3 unpaired electrons. 
C) paramagnetic, with 4 unpaired electrons. 
D) paramagnetic, with 5 unpaired electrons. 
E) diamagnetic. 
A) paramagnetic, with 1 unpaired electron. 
B) paramagnetic, with 3 unpaired electrons. 
C) paramagnetic, with 4 unpaired electrons. 
D) paramagnetic, with 5 unpaired electrons. 
E) diamagnetic.

Question 7

The correct formula for the dibromobis(oxalato)cobaltate(III)ion is [Co(C2O4)Br2]3+.

Accepted Answer

A) True 
 B)False

Question 8

Predict the number of unpaired electrons in the [Cr(en)3]2+ ion.

Accepted Answer

Question 9

The best name for K4[FeCl2(CN)4] is

Accepted Answer

A) tetrapotassium dichlorodicyanoiron(II). 
B) potassium dichlorodicyanoiron(II). 
C) potassium dichlorodicyanoferrate(III). 
D) tetrapotassium dichlorobis(cyano)iron(III). 
E) potassium dichlorotetracyanoferrate(II). 
A) tetrapotassium dichlorodicyanoiron(II). 
B) potassium dichlorodicyanoiron(II). 
C) potassium dichlorodicyanoferrate(III). 
D) tetrapotassium dichlorobis(cyano)iron(III). 
E) potassium dichlorotetracyanoferrate(II).

Question 10

Name the complex ion [CuCl3Br(NH3)2]2-.

Accepted Answer

diamminebr

Question 11

In the coordination compound [Cr(NH3)(en)2Cl]Br2, the coordination number (C.N.)and oxidation number (O.N.)of the metal atom are, respectively,

Accepted Answer

A) C.N.= 6; O.N.= +4. 
B) C.N.= 6; O.N.= +3. 
C) C.N.= 5; O.N.= +2. 
D) C.N.= 4; O.N.= +2. 
E) C.N.= 4; O.N.= +3. 
A) C.N.= 6; O.N.= +4. 
B) C.N.= 6; O.N.= +3. 
C) C.N.= 5; O.N.= +2. 
D) C.N.= 4; O.N.= +2. 
E) C.N.= 4; O.N.= +3.

Question 12

The numbers of geometrical isomers and optical isomers of the complex ion [Co(en)3]3+ are, respectively,

Accepted Answer

A) 2 and 2. 
B) 1 and 1. 
C) 3 and 2. 
D) 1 and 2. 
E) 2 and 4. 
A) 2 and 2. 
B) 1 and 1. 
C) 3 and 2. 
D) 1 and 2. 
E) 2 and 4.

Question 13

In the coordination compound [Co(en)2Cl2]Cl, the coordination number and oxidation number of the central atom are, respectively,

Accepted Answer

A) 4, +3. 
B) 6, +2. 
C) 4, +2. 
D) 6, +3. 
E) 4, +1. 
A) 4, +3. 
B) 6, +2. 
C) 4, +2. 
D) 6, +3. 
E) 4, +1.

Question 14

Bidentate and polydentate ligands are also called chelating agents.

Accepted Answer

A) True 
 B)False

Question 15

The electron configuration of a Co3+ ion is

Accepted Answer

A) [Ar]3d6. 
B) [Ar]4s13d5. 
C) [Ar] 4s23d4. 
D) [Ar]3d5. 
E) [Ar]3d4. 
A) [Ar]3d6. 
B) [Ar]4s13d5. 
C) [Ar] 4s23d4. 
D) [Ar]3d5. 
E) [Ar]3d4.

Question 16

In the complex ion [ML6]n+, Mn+ has six d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 17

The total number of electrons in the 3d orbitals of Ti3+ is

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 18

Write the chemical formula of the dibromobis(oxalato)cobaltate(III)ion.

Accepted Answer

The answer of Write the chemical formula of the dibromobis(oxalato)cobaltate(III)ion....

Question 19

Write the chemical formula of diamminedichloroplatinum(II).

Accepted Answer

The answer of Write the chemical formula of diamminedichloroplatinum(II)....

Question 20

In the complex ion [ML6]n+, Mn+ has seven d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 5 
A) 0 
B) 1 
C) 2 
D) 3 
E) 5

Exam 22: Transition Metal Chemistry and Coordination Compounds

In the following pair of complex ions, choose the one that absorbs light at a longer wavelength.

Draw and label the geometric isomers of [CrF2Cl4]3-?

Predict the number of unpaired electrons in the [CrCl6]4- ion.

Predict the number of unpaired electrons in the [Fe(CN)6]3- ion.

Labile complexes are coordination complexes that

The ion [Co(NH3)6]2+ is octahedral and high spin. This complex is

The correct formula for the dibromobis(oxalato)cobaltate(III)ion is [Co(C2O4)Br2]3+.

Predict the number of unpaired electrons in the [Cr(en)3]2+ ion.

The best name for K4[FeCl2(CN)4] is

Name the complex ion [CuCl3Br(NH3)2]2-.

In the coordination compound [Cr(NH3)(en)2Cl]Br2, the coordination number (C.N.)and oxidation number (O.N.)of the metal atom are, respectively,

The numbers of geometrical isomers and optical isomers of the complex ion [Co(en)3]3+ are, respectively,

In the coordination compound [Co(en)2Cl2]Cl, the coordination number and oxidation number of the central atom are, respectively,

Bidentate and polydentate ligands are also called chelating agents.

The electron configuration of a Co3+ ion is

In the complex ion [ML6]n+, Mn+ has six d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

The total number of electrons in the 3d orbitals of Ti3+ is

Write the chemical formula of the dibromobis(oxalato)cobaltate(III)ion.

Write the chemical formula of diamminedichloroplatinum(II).

In the complex ion [ML6]n+, Mn+ has seven d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

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Draw and label the geometric isomers of [CrF₂Cl₄]^3-?

Predict the number of unpaired electrons in the [CrCl₆]^4- ion.

Predict the number of unpaired electrons in the [Fe(CN)₆]^3- ion.

The ion [Co(NH₃)₆]²⁺ is octahedral and high spin. This complex is

The correct formula for the dibromobis(oxalato)cobaltate(III)ion is [Co(C₂O₄)Br₂]³⁺.

Predict the number of unpaired electrons in the [Cr(en)₃]²⁺ ion.

The best name for K₄[FeCl₂(CN)₄] is

Name the complex ion [CuCl₃Br(NH₃)₂]^2-.

In the coordination compound [Cr(NH₃)(en)₂Cl]Br₂, the coordination number (C.N.)and oxidation number (O.N.)of the metal atom are, respectively,

The numbers of geometrical isomers and optical isomers of the complex ion [Co(en)₃]³⁺ are, respectively,

In the coordination compound [Co(en)₂Cl₂]Cl, the coordination number and oxidation number of the central atom are, respectively,

The electron configuration of a Co³⁺ion is

In the complex ion [ML₆]ⁿ⁺, Mⁿ⁺ has six d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?

The total number of electrons in the 3d orbitals of Ti³⁺ is

In the complex ion [ML₆]ⁿ⁺, Mⁿ⁺ has seven d electrons and L is a weak field ligand.According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired electrons?