Question 1

The oxidation number of Co in [Co(NH3)4Cl2]Cl is +1.

Accepted Answer

A) True 
 B)False  False

Question 2

In the complex ion [Fe(CN)6]4-, the oxidation number of Fe is

Accepted Answer

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

Question 3

In the complex ion [Cr(C2O4)2(H2O)2]-, the oxidation number of Cr is

Accepted Answer

A) +1. 
B) +2. 
C) +3. 
D) -2. 
E) -1. 
A) +1. 
B) +2. 
C) +3. 
D) -2. 
E) -1. C

Question 4

Give (a)the oxidation number of the metal, (b)the number of d electrons, (c)the coordination number, (d)the charge of the complex ion, and (e)the number and type of ligands for the coordination compound shown below.

Accepted Answer

(a)+3, (b)3 d electr

Question 5

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+

Question 6

Which of these electron energy level patterns would absorb light with the shortest wavelength?

Accepted Answer

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

Question 7

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

Accepted Answer

A) [Co(NH)6]3+ 
B) [CoCl6]3- 
A) [Co(NH)6]3+ 
B) [CoCl6]3-

Question 8

The correct formula for the dichlorobis(ethylenediamine)chromium(III)ion is

Accepted Answer

A) [Cr(en)2Cl2]3+. 
B) [Cr(en)Cl2]+. 
C) [Cr(en)2Cl2]2+. 
D) [Cr(en)2Cl2]+. 
E) [Cr(en)3Cl2]+. 
A) [Cr(en)2Cl2]3+. 
B) [Cr(en)Cl2]+. 
C) [Cr(en)2Cl2]2+. 
D) [Cr(en)2Cl2]+. 
E) [Cr(en)3Cl2]+.

Question 9

How many geometric isomers are possible for the complex [CrF3Br3]3-? Draw these isomers.

Accepted Answer

Two geometric isomer

Question 10

The electron configuration of an Fe2+ ion is

Accepted Answer

A) [Ar]4s24d4. 
B) [Ar]4s23d6. 
C) [Ar]3d3. 
D) [Ar]3d5. 
E) [Ar]3d6. 
A) [Ar]4s24d4. 
B) [Ar]4s23d6. 
C) [Ar]3d3. 
D) [Ar]3d5. 
E) [Ar]3d6.

Question 11

Two well-known complex ions containing Ni are [Ni(H2O)6]2+, which is green, and [Ni(en)3]2+, which is purple. Which one of these statements is true?

Accepted Answer

A) The crystal field splitting energy ($\Delta$)is greater for [Ni(en)3]2+ than for [Ni(H2O)6]2+. 
B) [Ni(en)3]2+ absorbs energy in the red region of the spectrum. 
C) Both complex ions are diamagnetic. 
D) [Ni(H2O)6]2+ transmits light with wavelengths of approximately 650-700 nm. 
E) The green complex absorbs green light. 
A) The crystal field splitting energy ($\Delta$)is greater for [Ni(en)3]2+ than for [Ni(H2O)6]2+. 
B) [Ni(en)3]2+ absorbs energy in the red region of the spectrum. 
C) Both complex ions are diamagnetic. 
D) [Ni(H2O)6]2+ transmits light with wavelengths of approximately 650-700 nm. 
E) The green complex absorbs green light.

Question 12

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 13

How many unpaired electrons does the manganese ion have in [Mn(CN)6]4- ?

Accepted Answer

A) 1 unpaired electron 
B) 2 unpaired electrons 
C) 3 unpaired electrons 
D) 5 unpaired electrons 
E) No unpaired electrons 
A) 1 unpaired electron 
B) 2 unpaired electrons 
C) 3 unpaired electrons 
D) 5 unpaired electrons 
E) No unpaired electrons

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

How would you expect the molecule 1,10-phenanthroline (shown below)to function as a ligand?

Accepted Answer

A) It would be expected to be a monodentate ligand. 
B) It would be expected to be a bidentate ligand. 
C) It would be expected to be a tridentate ligand. 
D) It would be expected to be a tetradentate ligand. 
E) It would not be expected to function as a ligand. 
A) It would be expected to be a monodentate ligand. 
B) It would be expected to be a bidentate ligand. 
C) It would be expected to be a tridentate ligand. 
D) It would be expected to be a tetradentate ligand. 
E) It would not be expected to function as a ligand.

Question 16

Predict the number of unpaired electrons in the [Fe(CN)6]4- ion.

Accepted Answer

Question 17

A complex with the composition [MA2B2]X2 is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex is

Accepted Answer

A) linear. 
B) square planar. 
C) tetrahedral. 
D) octahedral. 
A) linear. 
B) square planar. 
C) tetrahedral. 
D) octahedral.

Question 18

A molecule or ion that provides an electron pair for coordinate covalent bond formation is called a Lewis ________.

Accepted Answer

The answer of A molecule or ion that provides an...

Question 19

In the complex ion [ML6]n+, Mn+ has five d electrons and L is a strong 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

Question 20

A molecule or atom that accepts an electron pair to form a coordinate covalent bond is called a Lewis _______.

Accepted Answer

The answer of A molecule or atom that accepts an...

Exam 20: The Chemistry of Coordination Compounds

The oxidation number of Co in [Co(NH3)4Cl2]Cl is +1.

In the complex ion [Fe(CN)6]4-, the oxidation number of Fe is

In the complex ion [Cr(C2O4)2(H2O)2]-, the oxidation number of Cr is

Give (a)the oxidation number of the metal, (b)the number of d electrons, (c)the coordination number, (d)the charge of the complex ion, and (e)the number and type of ligands for the coordination compound shown below.

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

Which of these electron energy level patterns would absorb light with the shortest wavelength?

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

The correct formula for the dichlorobis(ethylenediamine)chromium(III)ion is

How many geometric isomers are possible for the complex [CrF3Br3]3-? Draw these isomers.

The electron configuration of an Fe2+ ion is

Two well-known complex ions containing Ni are [Ni(H2O)6]2+, which is green, and [Ni(en)3]2+, which is purple. Which one of these statements is true?

Labile complexes are coordination complexes that

How many unpaired electrons does the manganese ion have in [Mn(CN)6]4- ?

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

How would you expect the molecule 1,10-phenanthroline (shown below)to function as a ligand?

Predict the number of unpaired electrons in the [Fe(CN)6]4- ion.

A complex with the composition [MA2B2]X2 is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex is

A molecule or ion that provides an electron pair for coordinate covalent bond formation is called a Lewis ________.

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

A molecule or atom that accepts an electron pair to form a coordinate covalent bond is called a Lewis _______.

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

The oxidation number of Co in [Co(NH₃)₄Cl₂]Cl is +1.

In the complex ion [Fe(CN)₆]^4-, the oxidation number of Fe is

In the complex ion [Cr(C₂O₄)₂(H₂O)₂]^-, the oxidation number of Cr is

How many geometric isomers are possible for the complex [CrF₃Br₃]^3-? Draw these isomers.

The electron configuration of an Fe²⁺ ion is

Two well-known complex ions containing Ni are [Ni(H₂O)₆]²⁺, which is green, and [Ni(en)₃]²⁺, which is purple. Which one of these statements is true?

How many unpaired electrons does the manganese ion have in [Mn(CN)₆]^4- ?

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

Predict the number of unpaired electrons in the [Fe(CN)₆]^4- ion.

A complex with the composition [MA₂B₂]X₂ is found to have no geometrical isomers. Both A and B are monodentate ligands. The structure of the complex is

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