Question 1

A complex ion is a square planar complex. It has a d8 electron configuration. What is the most reasonable d orbital scheme for this complex?

Accepted Answer

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

Question 2

A compound of which transition metal is responsible for the white color of most paper?

Accepted Answer

A)  chromium 
B)  titanium 
C)  zinc 
D)  nickel 
E)  copper 
A)  chromium 
B)  titanium 
C)  zinc 
D)  nickel 
E)  copper

Question 3

Which of the following statements is/are true of bonding in complex ions?
1. A complex ion with a coordination number of 3 has an octahedral arrangement of ligands and that complexes with two ligands are linear.
2. An octahedral set of orbitals is formed by the hybridization of one d, one s, and two p orbitals to give six dsp2 orbitals.
3. For a tetrahedral arrangement of ligands, an sp3 hybrid set is required.

Accepted Answer

A)  ​3 only 
B)  ​2 only 
C)  ​1 only 
D)  ​2 and 3 
E)  ​1 and 3 
A)  ​3 only 
B)  ​2 only 
C)  ​1 only 
D)  ​2 and 3 
E)  ​1 and 3

Question 4

A coordination compound of Cu2+ can be described as Cu(NH3)xSO4 and is known to contain 29.9% NH3. What is the value of x?

Accepted Answer

A)  6 
B)  3 
C)  4 
D)  2 
E)  none of these 
A)  6 
B)  3 
C)  4 
D)  2 
E)  none of these

Question 5

In the Lewis acid-base model, acids are ______ and bases are ______.

Accepted Answer

A)  H3O+ donors, H3O+ acceptors 
B)  H+ donors, H+ acceptors 
C)  electron pair acceptors, electron pair donors 
D)  H3O+ donors, OH- donors 
E)  electron pair donors, electron pair acceptors 
A)  H3O+ donors, H3O+ acceptors 
B)  H+ donors, H+ acceptors 
C)  electron pair acceptors, electron pair donors 
D)  H3O+ donors, OH- donors 
E)  electron pair donors, electron pair acceptors

Question 6

In describing the bonding in coordination compounds Lewis proposed that ______ were acids and ______ were bases.

Accepted Answer

A)  electrons, metal ions 
B)  electron pairs, ligands 
C)  ligands, metal ions 
D)  metal ions, ligands 
E)  ligands, electron pairs 
A)  electrons, metal ions 
B)  electron pairs, ligands 
C)  ligands, metal ions 
D)  metal ions, ligands 
E)  ligands, electron pairs

Question 7

How many of the following compounds exhibit geometric isomers?
I.Pd(NH3)2Br2 (square planar)
II.[Co(H2O)2]Br3
III.[Ni(H2O)4(NO2)2]
IV.K2[CoCl4]

Accepted Answer

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

Question 8

Which of the following is a d2 ion?

Accepted Answer

A)  Mn3+ 
B)  Ti+ 
C)  Fe3+ 
D)  Cr2+ 
E)  Ti2+ 
A)  Mn3+ 
B)  Ti+ 
C)  Fe3+ 
D)  Cr2+ 
E)  Ti2+

Question 9

Explain how the molecular orbital model accounts for the fact that NH3 lies higher (larger splitting) on the spectrochemical series than F-.

Accepted Answer

See Sectio

Question 10

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species.
-Fe(OH2)63+ (assume weak field)

Accepted Answer

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

Question 11

Which of the following is paramagnetic?

Accepted Answer

A)  [Co(NH3)6]3+ (strong field) 
B)  [Cu(en)3]+ 
C)  [Mn(CN)6]4- (strong field) 
D)  [Fe(CN)6]4- (strong field) 
E)  [Zn(H2O)6]2+ 
A)  [Co(NH3)6]3+ (strong field) 
B)  [Cu(en)3]+ 
C)  [Mn(CN)6]4- (strong field) 
D)  [Fe(CN)6]4- (strong field) 
E)  [Zn(H2O)6]2+

Question 12

Identify the true statement(s) of scandium.
1. The predominant oxidation state of Scandium is +6.
2. The chemistry of scandium strongly resembles that of the lanthanides, with most of its compounds being colorless and diamagnetic.
3. Scandium metal can be prepared by electrolysis of molten ScCl3.​

Accepted Answer

A)  ​1 only 
B)  ​2 only 
C)  ​3 only 
D)  ​1 and 2 
E)  ​2 and 3 
A)  ​1 only 
B)  ​2 only 
C)  ​3 only 
D)  ​1 and 2 
E)  ​2 and 3

Question 13

Which of the following is a d7 ion?

Accepted Answer

A)  Co2+ 
B)  Zn2+ 
C)  Fe2+ 
D)  Cr3+ 
E)  Cu+ 
A)  Co2+ 
B)  Zn2+ 
C)  Fe2+ 
D)  Cr3+ 
E)  Cu+

Question 14

Which of the metal ions in the following complex ions has a d5 electron configuration?

Accepted Answer

A)  [FeCl6]4- 
B)  [Cr(CN)6]3- 
C)  [Ti(H2O)6]2+ 
D)  [Mo(NH3)6]3+ 
E)  [Fe(CN)6]3- 
A)  [FeCl6]4- 
B)  [Cr(CN)6]3- 
C)  [Ti(H2O)6]2+ 
D)  [Mo(NH3)6]3+ 
E)  [Fe(CN)6]3-

Question 15

Which of the following statements is true of the crystal field model?

Accepted Answer

A)  The electrons are assumed to be localized. 
B)  The metal ion-ligand bonds are considered completely ionic. 
C)  The ligands are treated as negative point charges. 
D)  The interaction between metal ion and ligand is treated as a Lewis acid-base interaction. 
E)  None of these statements is true. 
A)  The electrons are assumed to be localized. 
B)  The metal ion-ligand bonds are considered completely ionic. 
C)  The ligands are treated as negative point charges. 
D)  The interaction between metal ion and ligand is treated as a Lewis acid-base interaction. 
E)  None of these statements is true.

Question 16

According to crystal field theory, how many unpaired electrons are present in the complex ion [Zn(H2O)6]2+?

Accepted Answer

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

Question 17

Which of the following complexes shows geometric isomerism?

Accepted Answer

A)  K[Co(H2O)2Cl4] 
B)  [Co(H2O)5Cl]Cl2 
C)  [Co(H2O)5Cl]SO4 
D)  Na3[CoCl6] 
E)  [Co(H2O)6]Cl3 
A)  K[Co(H2O)2Cl4] 
B)  [Co(H2O)5Cl]Cl2 
C)  [Co(H2O)5Cl]SO4 
D)  Na3[CoCl6] 
E)  [Co(H2O)6]Cl3

Question 18

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species.
-[Co(NH3)4Br2]+

Accepted Answer

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

Question 19

You analyze for pyridine (Kb is approximately 10-9) by dissolving 0.1000 g of the complex in 100 mL of H2O and titrating with a 0.01 M HCl solution. Which of the following indicators should be used to detect the endpoint? (Assume that the initial concentration of pyridine is approximately 0.01 M.)

Accepted Answer

A)  thymol blue, pH range of color change = 8.0-9.6 
B)  methyl red, pH range of color change = 4.8-6.0 
C)  bromophenol blue, pH range of color change = 3.0-4.6 
D)  bromothymol blue, pH range of color change = 6.0-7.6 
E)  alizarin yellow, pH range of color change = 10.1-12.0 
A)  thymol blue, pH range of color change = 8.0-9.6 
B)  methyl red, pH range of color change = 4.8-6.0 
C)  bromophenol blue, pH range of color change = 3.0-4.6 
D)  bromothymol blue, pH range of color change = 6.0-7.6 
E)  alizarin yellow, pH range of color change = 10.1-12.0

Question 20

Which of the following statements about the complex ion Co(en)2Cl2+ is true?
(en = ethylenediamine, NH2CH2CH2NH2)

Accepted Answer

A)  The geometric isomers of the complex ion have identical chemical properties. 
B)  The complex ion exhibits two geometric isomers (cis and trans) and two optical isomers. 
C)  Because en is a strong field ligand (large Δ), the complex ion is paramagnetic. 
D)  The complex ion exhibits cis and trans geometric isomers, but no optical isomers. 
E)  The complex ion contains Co(I). 
A)  The geometric isomers of the complex ion have identical chemical properties. 
B)  The complex ion exhibits two geometric isomers (cis and trans) and two optical isomers. 
C)  Because en is a strong field ligand (large Δ), the complex ion is paramagnetic. 
D)  The complex ion exhibits cis and trans geometric isomers, but no optical isomers. 
E)  The complex ion contains Co(I).

A complex ion is a square planar complex. It has a d⁸ electron configuration. What is the most reasonable d orbital scheme for this complex?

A compound of which transition metal is responsible for the white color of most paper?

A coordination compound of Cu²⁺ can be described as Cu(NH₃)_xSO₄ and is known to contain 29.9% NH₃. What is the value of x?

In the Lewis acid-base model, acids are and bases are .

In describing the bonding in coordination compounds Lewis proposed that were acids and were bases.

How many of the following compounds exhibit geometric isomers? I.Pd(NH₃)₂Br₂ (square planar) II.[Co(H₂O)₂]Br₃ III.[Ni(H₂O)₄(NO₂)₂] IV.K₂[CoCl₄]

Which of the following is a d² ion?

Explain how the molecular orbital model accounts for the fact that NH₃ lies higher (larger splitting) on the spectrochemical series than F^-.

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -Fe(OH₂)₆³⁺ (assume weak field)

Which of the following is paramagnetic?

Identify the true statement(s) of scandium. 1. The predominant oxidation state of Scandium is +6. 2. The chemistry of scandium strongly resembles that of the lanthanides, with most of its compounds being colorless and diamagnetic. 3. Scandium metal can be prepared by electrolysis of molten ScCl₃.

Which of the following is a d⁷ ion?

Which of the metal ions in the following complex ions has a d⁵ electron configuration?

Which of the following statements is true of the crystal field model?

According to crystal field theory, how many unpaired electrons are present in the complex ion [Zn(H₂O)₆]²⁺?

Which of the following complexes shows geometric isomerism?

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -[Co(NH₃)₄Br₂]⁺

Which of the following statements about the complex ion Co(en)₂Cl₂⁺ is true? (en = ethylenediamine, NH₂CH₂CH₂NH₂)

Atoms, Molecules, and Ions

Stoichiometry

Types of Chemical Reactions and Solution Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Quantum Mechanics and Atomic Theory

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

Exam 19: Transition Metals and Coordination Chemistry

A complex ion is a square planar complex. It has a d8 electron configuration. What is the most reasonable d orbital scheme for this complex?

A compound of which transition metal is responsible for the white color of most paper?

A coordination compound of Cu2+ can be described as Cu(NH3)xSO4 and is known to contain 29.9% NH3. What is the value of x?

In the Lewis acid-base model, acids are ______ and bases are ______.

In describing the bonding in coordination compounds Lewis proposed that ______ were acids and ______ were bases.

How many of the following compounds exhibit geometric isomers? I.Pd(NH3)2Br2 (square planar) II.[Co(H2O)2]Br3 III.[Ni(H2O)4(NO2)2] IV.K2[CoCl4]

Which of the following is a d2 ion?

Explain how the molecular orbital model accounts for the fact that NH3 lies higher (larger splitting) on the spectrochemical series than F-.

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -Fe(OH2)63+ (assume weak field)

Which of the following is paramagnetic?

Which of the following is a d7 ion?

Which of the metal ions in the following complex ions has a d5 electron configuration?

Which of the following statements is true of the crystal field model?

According to crystal field theory, how many unpaired electrons are present in the complex ion [Zn(H2O)6]2+?

Which of the following complexes shows geometric isomerism?

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -[Co(NH3)4Br2]+

You analyze for pyridine (Kb is approximately 10-9) by dissolving 0.1000 g of the complex in 100 mL of H2O and titrating with a 0.01 M HCl solution. Which of the following indicators should be used to detect the endpoint? (Assume that the initial concentration of pyridine is approximately 0.01 M.)

Which of the following statements about the complex ion Co(en)2Cl2+ is true? (en = ethylenediamine, NH2CH2CH2NH2)

Atoms, Molecules, and Ions

Stoichiometry

Types of Chemical Reactions and Solution Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Quantum Mechanics and Atomic Theory

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

A complex ion is a square planar complex. It has a d⁸ electron configuration. What is the most reasonable d orbital scheme for this complex?

A coordination compound of Cu²⁺ can be described as Cu(NH₃)_xSO₄ and is known to contain 29.9% NH₃. What is the value of x?

In the Lewis acid-base model, acids are and bases are .

In describing the bonding in coordination compounds Lewis proposed that were acids and were bases.

How many of the following compounds exhibit geometric isomers? I.Pd(NH₃)₂Br₂ (square planar) II.[Co(H₂O)₂]Br₃ III.[Ni(H₂O)₄(NO₂)₂] IV.K₂[CoCl₄]

Which of the following is a d² ion?

Explain how the molecular orbital model accounts for the fact that NH₃ lies higher (larger splitting) on the spectrochemical series than F^-.

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -Fe(OH₂)₆³⁺ (assume weak field)

Which of the following is a d⁷ ion?

Which of the metal ions in the following complex ions has a d⁵ electron configuration?

According to crystal field theory, how many unpaired electrons are present in the complex ion [Zn(H₂O)₆]²⁺?

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -[Co(NH₃)₄Br₂]⁺

Which of the following statements about the complex ion Co(en)₂Cl₂⁺ is true? (en = ethylenediamine, NH₂CH₂CH₂NH₂)