Question 1

The compound Rh(CO) (H) (PH3)2 forms cis and trans isomers.Use this information to predict the geometry of this complex isomer.

Accepted Answer

The complex has four ligands a

Question 2

How many 3d electrons does a ground-state Pd2+ ion have?

Accepted Answer

A) 8 
B) 10 
C) 9 
D) 7 
E) 6 
A) 8 
B) 10 
C) 9 
D) 7 
E) 6

Question 3

Why is the +2 oxidation state so common among transition elements?

Accepted Answer

The outermost electr

Question 4

What is the electron configuration of a ground-state Nb2+ ion?

Accepted Answer

A) 1s22s22p63s23p64s23d104p65s24d1 
B) 1s22s22p63s23p64s23d104p64d3 
C) 1s22s22p63s23p64s23d104p65s14d2 
D) 1s22s22p63s23p64s23d104p64d5 
E) 1s22s22p63s23p64s23d104p65s24d3 
A) 1s22s22p63s23p64s23d104p65s24d1 
B) 1s22s22p63s23p64s23d104p64d3 
C) 1s22s22p63s23p64s23d104p65s14d2 
D) 1s22s22p63s23p64s23d104p64d5 
E) 1s22s22p63s23p64s23d104p65s24d3

Question 5

How many unpaired electrons are there in the complex ion [Mn(CN)6]3-?

Accepted Answer

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

Question 6

Which of the following will be diamagnetic?

Accepted Answer

A) Ni2+ 
B) Cr2+ 
C) Mn2+ 
D) Co3+ 
E) Ti4+ 
A) Ni2+ 
B) Cr2+ 
C) Mn2+ 
D) Co3+ 
E) Ti4+

Question 7

The following energy-level diagram could correspond to which coordination compound?

Accepted Answer

A) hexabromomanganate(II) 
B) hexacyanoferrate(II) 
C) hexacyanoferrate(III) 
D) hexabromomanganate(IV) 
E) hexachlorochromate(II) 
A) hexabromomanganate(II) 
B) hexacyanoferrate(II) 
C) hexacyanoferrate(III) 
D) hexabromomanganate(IV) 
E) hexachlorochromate(II)

Question 8

Which of the following ligands has two different types of donor atoms?

Accepted Answer

A) NH3 
B) H2O 
C) NH4+ 
D) NO2- 
E) ethylenediamine 
A) NH3 
B) H2O 
C) NH4+ 
D) NO2- 
E) ethylenediamine

Question 9

What is the name of the molecules or ions that surround the metal in a complex ion?

Accepted Answer

A) Chelaters 
B) Donors 
C) Acceptors 
D) Coordinators 
E) Ligands 
A) Chelaters 
B) Donors 
C) Acceptors 
D) Coordinators 
E) Ligands

Question 10

Ethylenediaminetetraacetic acid (EDTA)is an effective antidote for heavy metal poisoning (e.g.,Pb2+ and Hg2+).

Accepted Answer

A) True 
 B)False

Question 11

What is the formula for pentaamminechlorocobalt(III)chloride?

Accepted Answer

A) [Co(NH3)5Cl]Cl 
B) [Co(NH3)5Cl]Cl2 
C) [Co(NH3)5Cl]Cl3 
D) [Co(NH3)5Cl]Cl4 
E) [CoCl3](NH3)5 
A) [Co(NH3)5Cl]Cl 
B) [Co(NH3)5Cl]Cl2 
C) [Co(NH3)5Cl]Cl3 
D) [Co(NH3)5Cl]Cl4 
E) [CoCl3](NH3)5

Question 12

Which of these diagrams represent the crystal field splitting between d orbitals in an octahedral complex?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 13

In a reaction between a metal ion and a group of anions or a polar molecule,the anions or polar molecule acts as a _______ ________.

Accepted Answer

The answer of In a reaction between a metal ion...

Question 14

In the compound K[Co(C2O4)2(H2O)2] (where C2O42- = oxalate)the oxidation number and coordination number of cobalt are _____ and _____,respectively.

Accepted Answer

A) -1; 4 
B) -1; 6 
C) +3; 4 
D) +3; 6 
E) +1; 6 
A) -1; 4 
B) -1; 6 
C) +3; 4 
D) +3; 6 
E) +1; 6

Question 15

In the coordination compound K2[Co(en)Cl4],the coordination number (C.N.)and oxidation number (O.N.)of cobalt are,respectively,

Accepted Answer

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

Question 16

A bidentate ligand always

Accepted Answer

A) forms bonds to two metal ions. 
B) has a charge of 2+ or 2-. 
C) forms complex ions with a charge of 2+ or 2-. 
D) has two donor atoms. 
E) has medical uses. 
A) forms bonds to two metal ions. 
B) has a charge of 2+ or 2-. 
C) forms complex ions with a charge of 2+ or 2-. 
D) has two donor atoms. 
E) has medical uses.

Question 17

Which one of these species is a bidentate ligand?

Accepted Answer

A) CN- 
B) NH3 
C) CO 
D) H2NCH2CH2NH2 
E) EDTA 
A) CN- 
B) NH3 
C) CO 
D) H2NCH2CH2NH2 
E) EDTA

Question 18

Which are the most common transition metals?

Accepted Answer

A) The transition metals in the 3rd period. 
B) The transition metals in the 4th period. 
C) The elements in Group 6B. 
D) The transition metals in the 5th period. 
E) The transition metals in the 6th period. 
A) The transition metals in the 3rd period. 
B) The transition metals in the 4th period. 
C) The elements in Group 6B. 
D) The transition metals in the 5th period. 
E) The transition metals in the 6th period.

Question 19

What is the coordination number of cobalt in the complex ion [Co(en)Cl4]-? (en = ethylenediamine)

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6 
E) 8 
A) 1 
B) 2 
C) 4 
D) 6 
E) 8

Question 20

What type of structure is exhibited by most of the transition metals?

Accepted Answer

A) Close-packed 
B) Tetrahedral 
C) Trigonal planar 
D) Trigonal pyramidal 
E) None of the answers is correct. 
A) Close-packed 
B) Tetrahedral 
C) Trigonal planar 
D) Trigonal pyramidal 
E) None of the answers is correct.

Exam 22: Coordination Chemistry

The compound Rh(CO) (H) (PH3)2 forms cis and trans isomers.Use this information to predict the geometry of this complex isomer.

How many 3d electrons does a ground-state Pd2+ ion have?

Why is the +2 oxidation state so common among transition elements?

What is the electron configuration of a ground-state Nb2+ ion?

How many unpaired electrons are there in the complex ion [Mn(CN)6]3-?

Which of the following will be diamagnetic?

The following energy-level diagram could correspond to which coordination compound?

Which of the following ligands has two different types of donor atoms?

What is the name of the molecules or ions that surround the metal in a complex ion?

Ethylenediaminetetraacetic acid (EDTA)is an effective antidote for heavy metal poisoning (e.g.,Pb2+ and Hg2+).

What is the formula for pentaamminechlorocobalt(III)chloride?

Which of these diagrams represent the crystal field splitting between d orbitals in an octahedral complex?

In a reaction between a metal ion and a group of anions or a polar molecule,the anions or polar molecule acts as a _______ ________.

In the compound K[Co(C2O4)2(H2O)2] (where C2O42- = oxalate)the oxidation number and coordination number of cobalt are _____ and _____,respectively.

In the coordination compound K2[Co(en)Cl4],the coordination number (C.N.)and oxidation number (O.N.)of cobalt are,respectively,

A bidentate ligand always

Which one of these species is a bidentate ligand?

Which are the most common transition metals?

What is the coordination number of cobalt in the complex ion [Co(en)Cl4]-? (en = ethylenediamine)

What type of structure is exhibited by most of the transition metals?

Chemistry: the Central Science

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Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

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Chemical Bonding Ii Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

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Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

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Nonmetallic Elements and Their Compounds

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Filters

The compound Rh(CO) (H) (PH₃)₂ forms cis and trans isomers.Use this information to predict the geometry of this complex isomer.

How many 3d electrons does a ground-state Pd²⁺ ion have?

What is the electron configuration of a ground-state Nb²⁺ ion?

How many unpaired electrons are there in the complex ion [Mn(CN)₆]^3-?

Ethylenediaminetetraacetic acid (EDTA)is an effective antidote for heavy metal poisoning (e.g.,Pb²⁺ and Hg²⁺).

In a reaction between a metal ion and a group of anions or a polar molecule,the anions or polar molecule acts as a _ __.

In the compound K[Co(C₂O₄)₂(H₂O)₂] (where C₂O₄^2- = oxalate)the oxidation number and coordination number of cobalt are _ and _,respectively.

In the coordination compound K₂[Co(en)Cl₄],the coordination number (C.N.)and oxidation number (O.N.)of cobalt are,respectively,

What is the coordination number of cobalt in the complex ion [Co(en)Cl₄]^-? (en = ethylenediamine)