Question 1

What is the coordination number of cobalt in [Co(NH3)5Cl](NO3)2?

Accepted Answer

A) 12 
B) 8 
C) 4 
D) 2 
E) 6 
A) 12 
B) 8 
C) 4 
D) 2 
E) 6

Question 2

Six-coordinate complexes generally have __________ geometry.

Accepted Answer

The answer of Six-coordinate complexes generally have __________ geometry....

Question 3

The coordination number of platinum in complexes is always __________.

Accepted Answer

A) 4 
B) 5 
C) 2 
D) 3 
E) 6 
A) 4 
B) 5 
C) 2 
D) 3 
E) 6

Question 4

The correct name for [Co(NH3)5Cl]Cl2 is __________.

Accepted Answer

A) pentaaminechlorocobalt(III)chloride 
B) chloropentaammoniacobalt (II)chloride 
C) pentaammoniachlorocobalt(II)chloride 
D) cobalt(III)pentaamino trichloride 
E) none of the above 
A) pentaaminechlorocobalt(III)chloride 
B) chloropentaammoniacobalt (II)chloride 
C) pentaammoniachlorocobalt(II)chloride 
D) cobalt(III)pentaamino trichloride 
E) none of the above

Question 5

Which one of the following complexes would most likely have tetrahedral geometry?

Accepted Answer

A) [NiCl4]2- 
B) [Co(H2O)6]2+ 
C) [Cr(NH3)6]3+ 
D) [Fe(CN)6]3 
E) [Pt(NH3)2Cl2] 
A) [NiCl4]2- 
B) [Co(H2O)6]2+ 
C) [Cr(NH3)6]3+ 
D) [Fe(CN)6]3 
E) [Pt(NH3)2Cl2]

Question 6

Which one of the following complexes can exhibit geometrical isomerism?

Accepted Answer

A) [Pt(NH3)2Cl2] (square planar) 
B) [Zn(NH3)2Cl2] (tetrahedral) 
C) [Cu(NH3)4]2+ (square planar) 
D) [Cu(NH3)5Cl]2+ (octahedral) 
E) All of the above can exhibit geometrical isomerism. 
A) [Pt(NH3)2Cl2] (square planar) 
B) [Zn(NH3)2Cl2] (tetrahedral) 
C) [Cu(NH3)4]2+ (square planar) 
D) [Cu(NH3)5Cl]2+ (octahedral) 
E) All of the above can exhibit geometrical isomerism.

Question 7

Changes in the coordination sphere of a complex compound may lead to changes in __________.

Accepted Answer

A) color 
B) physical properties 
C) chemical properties 
D) stability 
E) all of the above 
A) color 
B) physical properties 
C) chemical properties 
D) stability 
E) all of the above

Question 8

In the following reaction, Ni2+ is acting as a(n)__________. Ni2+ (g)+ 6H2O (l)→ Ni(H2O)62+ (aq)

Accepted Answer

A) oxidizing agent 
B) Lewis acid 
C) precipitating agent 
D) solvent 
E) ligand 
A) oxidizing agent 
B) Lewis acid 
C) precipitating agent 
D) solvent 
E) ligand

Question 9

What form of hemoglobin is purplish-red?

Accepted Answer

A) myoglobin 
B) deoxyhemoglobin 
C) heme 
D) oxyhemoglobin 
E) none of the above 
A) myoglobin 
B) deoxyhemoglobin 
C) heme 
D) oxyhemoglobin 
E) none of the above

Question 10

How many d electrons are in the cobalt ion of K3[Co(CN)6]?

Accepted Answer

A) 3 
B) 5 
C) 6 
D) 7 
E) 4 
A) 3 
B) 5 
C) 6 
D) 7 
E) 4

Question 11

Name the compound, [Os(en)3]2[NiCl2Br2]3.

Accepted Answer

tris(ethylenediamine

Question 12

Which one of the following is the correct formula for potassium diaquatetrachloromolybdate (III)?

Accepted Answer

A) K2[Mo(H2O)2Cl4] 
B) K[Mo(H2O)2Cl2]Cl2 
C) K[Mo(H2O)2Cl4] 
D) Mo[K(H2O)2]Cl4 
E) K3[Mo(H2O)2Cl4] 
A) K2[Mo(H2O)2Cl4] 
B) K[Mo(H2O)2Cl2]Cl2 
C) K[Mo(H2O)2Cl4] 
D) Mo[K(H2O)2]Cl4 
E) K3[Mo(H2O)2Cl4]

Question 13

Which of the following complexes has a coordination number of 6?

Accepted Answer

A) [Co(en)2Cl2]+ 
B) [Pt(NH3)2Cl2] 
C) [Cu(NH3)4]2+ 
D) [Ag(NH3)2]+ 
E) None of these complexes has coordination number 6. 
A) [Co(en)2Cl2]+ 
B) [Pt(NH3)2Cl2] 
C) [Cu(NH3)4]2+ 
D) [Ag(NH3)2]+ 
E) None of these complexes has coordination number 6.

Question 14

List three of the ten transition metals required for human life.

Accepted Answer

Any three of: Co, Cu

Question 15

The energy of a metal ligand complex is higher than the energy of the separated components.

Accepted Answer

A) True 
 B)False

Question 16

Based on the crystal-field strengths F- 2CN 3 2- -, which Co(III)complex is most likely high-spin?

Accepted Answer

A) [Co(NH3)6]3+ 
B) [Co(NO2)6]3- 
C) [Co(CN)6]3- 
D) [CoF6]3- 
E) [Co(CH3CN)6]3+ 
A) [Co(NH3)6]3+ 
B) [Co(NO2)6]3- 
C) [Co(CN)6]3- 
D) [CoF6]3- 
E) [Co(CH3CN)6]3+

Question 17

A compound that can occupy two coordination sites is a (an)__________.

Accepted Answer

The answer of A compound that can occupy two coordination...

Question 18

How many d electrons are associated with the metal ion in [Cr(NH3)6]3+?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 19

The "dentation" of a ligand is defined by __________.

Accepted Answer

A) how many "dents" or "deceptions" there are in the coordination sphere of a complex species it forms 
B) how many electron donor atoms it utilizes to form coordinate bonds to the central metal ion 
C) the total number of lone pairs of electrons it possesses 
D) how many metal ions it can sequester from solution 
E) none of the above 
A) how many "dents" or "deceptions" there are in the coordination sphere of a complex species it forms 
B) how many electron donor atoms it utilizes to form coordinate bonds to the central metal ion 
C) the total number of lone pairs of electrons it possesses 
D) how many metal ions it can sequester from solution 
E) none of the above

Question 20

The lanthanide contraction is responsible for the fact that

Accepted Answer

A) Zr and Y have about the same radius. 
B) Zr and Nb have similar oxidation states. 
C) Zr and Hf have about the same radius. 
D) Zr and Zn have similar oxidation states. 
E) Zr and Hf have the same oxidation states. 
A) Zr and Y have about the same radius. 
B) Zr and Nb have similar oxidation states. 
C) Zr and Hf have about the same radius. 
D) Zr and Zn have similar oxidation states. 
E) Zr and Hf have the same oxidation states.

Exam 23: Transition Metals and Coordination Chemistry

What is the coordination number of cobalt in [Co(NH3)5Cl](NO3)2?

Six-coordinate complexes generally have __________ geometry.

The coordination number of platinum in complexes is always __________.

The correct name for [Co(NH3)5Cl]Cl2 is __________.

Which one of the following complexes would most likely have tetrahedral geometry?

Which one of the following complexes can exhibit geometrical isomerism?

Changes in the coordination sphere of a complex compound may lead to changes in __________.

In the following reaction, Ni2+ is acting as a(n)__________. Ni2+ (g)+ 6H2O (l)→ Ni(H2O)62+ (aq)

What form of hemoglobin is purplish-red?

How many d electrons are in the cobalt ion of K3[Co(CN)6]?

Name the compound, [Os(en)3]2[NiCl2Br2]3.

Which one of the following is the correct formula for potassium diaquatetrachloromolybdate (III)?

Which of the following complexes has a coordination number of 6?

List three of the ten transition metals required for human life.

The energy of a metal ligand complex is higher than the energy of the separated components.

Based on the crystal-field strengths F- < CH2CN < NH3 < NO2- < CN-, which Co(III)complex is most likely high-spin?

A compound that can occupy two coordination sites is a (an)__________.

How many d electrons are associated with the metal ion in [Cr(NH3)6]3+?

The "dentation" of a ligand is defined by __________.

The lanthanide contraction is responsible for the fact that

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Filters

What is the coordination number of cobalt in [Co(NH₃)₅Cl](NO₃)₂?

The correct name for [Co(NH₃)₅Cl]Cl₂is __________.

In the following reaction, Ni²⁺ is acting as a(n)__________. Ni²⁺ (g)+ 6H₂O (l)→ Ni(H₂O)₆²⁺ (aq)

How many d electrons are in the cobalt ion of K₃[Co(CN)₆]?

Name the compound, [Os(en)₃]₂[NiCl₂Br₂]₃.

Based on the crystal-field strengths F^- < CH₂CN < NH₃ < NO₂^- < CN^-, which Co(III)complex is most likely high-spin?

How many d electrons are associated with the metal ion in [Cr(NH₃)₆]³⁺?