Question 1

What is the correct name of the following ion: [Zn(CN)4]2-

Accepted Answer

A)  zinc quadracyanide 
B)  tetracyanozincate(II) 
C)  zinc cyanide 
D)  tetracyanozinc(II) 
E)  cyanozinc(4) 
A)  zinc quadracyanide 
B)  tetracyanozincate(II) 
C)  zinc cyanide 
D)  tetracyanozinc(II) 
E)  cyanozinc(4)

Question 2

What is the approximate concentration of free Cu2+ remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M CuCl2 with 5.0 mL of 2.0 M ethylenediamine? [The net formation constant for the bis(ethylenediaminecopper(II) ion is 1 × 1020.]

Accepted Answer

A)  9 × 10-22 M 
B)  7 × 10-22 M 
C)  2 × 10-22 M 
D)  1 × 10-21 M 
E)  6 × 10-22 M 
A)  9 × 10-22 M 
B)  7 × 10-22 M 
C)  2 × 10-22 M 
D)  1 × 10-21 M 
E)  6 × 10-22 M

Question 3

The [Fe(CN)6]3- complex ion:

Accepted Answer

A)  exhibits square planar geometry 
B)  is diamagnetic 
C)  exhibits octahedral geometry 
D)  has two unpaired electrons 
E)  has four unpaired electrons 
A)  exhibits square planar geometry 
B)  is diamagnetic 
C)  exhibits octahedral geometry 
D)  has two unpaired electrons 
E)  has four unpaired electrons

Question 4

High spin refers to the maximum number of ligands attached to the metal ion.

Accepted Answer

A) True 
 B)False

Question 5

A compound has the empirical formula CoCl3 ∙ 5NH3. One mole of it yields three moles of silver chloride when treated with silver nitrate. Ammonia is not removed by treatment with concentrated sulfuric acid. A reasonable formula for the compound is ________.

Accepted Answer

A)  [Co(NH3)5]Cl3 
B)  CoCl3 ∙ 5NH3 
C)  [Co(NH3)4Cl]Cl2 ∙ NH3 
D)  [Co(NH3)5Cl]Cl2 
E)  [Co(NH3)4Cl2]Cl ∙ NH3 
A)  [Co(NH3)5]Cl3 
B)  CoCl3 ∙ 5NH3 
C)  [Co(NH3)4Cl]Cl2 ∙ NH3 
D)  [Co(NH3)5Cl]Cl2 
E)  [Co(NH3)4Cl2]Cl ∙ NH3

Question 6

Which of the following ligands cannot act as a chelating agent?

Accepted Answer

A)  nitrite ion 
B)  ethylenediamine 
C)  ethylenediaminetetracetate ion 
D)  hydrazine 
E)  oxalate ion 
A)  nitrite ion 
B)  ethylenediamine 
C)  ethylenediaminetetracetate ion 
D)  hydrazine 
E)  oxalate ion

Question 7

What is the approximate concentration of free Fe2+ remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M FeSO4 with 5.0 mL of 2.0 M KCN? [The net formation constant for the hexacyanoferrate(II) ion is 1 × 1037.]

Accepted Answer

A)  3 × 10-22 M 
B)  7 × 10-30 M 
C)  4 × 10-38 M 
D)  5 × 10-37 M 
E)  4 × 10-40 M 
A)  3 × 10-22 M 
B)  7 × 10-30 M 
C)  4 × 10-38 M 
D)  5 × 10-37 M 
E)  4 × 10-40 M

Question 8

Choose the INCORRECT statement.

Accepted Answer

A)  The coordination number is the number of ligands which can attach to a metal center. 
B)  A ligand supplies one or more electron pairs to bond to the metal ion. 
C)  The ligand-metal ion bond is a coordinate covalent bond. 
D)  A ligand is a Lewis base. 
E)  A ligand that donates a pair of electrons is multidentate. 
A)  The coordination number is the number of ligands which can attach to a metal center. 
B)  A ligand supplies one or more electron pairs to bond to the metal ion. 
C)  The ligand-metal ion bond is a coordinate covalent bond. 
D)  A ligand is a Lewis base. 
E)  A ligand that donates a pair of electrons is multidentate.

Question 9

Ligands approaching in a tetrahedral pattern cause some orbitals to be raised in energy. How many orbitals are on the lower energy level?

Accepted Answer

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

Question 10

Enantiomers are isomers which are not chiral.

Accepted Answer

A) True 
 B)False

Question 11

What is the correct IUPAC name for [Co(NH3)6]2+?

Accepted Answer

A)  hexammoniacobaltate(II) 
B)  hexaamminecobaltate(II) 
C)  hexammoniacobalt(II) 
D)  hexaamminecobalt(II) 
E)  hexaamminecobaltium(II) 
A)  hexammoniacobaltate(II) 
B)  hexaamminecobaltate(II) 
C)  hexammoniacobalt(II) 
D)  hexaamminecobalt(II) 
E)  hexaamminecobaltium(II)

Question 12

The overall formation constant can be calculated by multiplying the constant for each step of the formation.

Accepted Answer

A) True 
 B)False

Question 13

Choose the correct shape, weak or strong field, and number of unpaired electrons for [Co(ox)3]4-.

Accepted Answer

A)  tetrahedral, weak, 3 
B)  tetrahedral, strong, 3 
C)  square planar, strong, 3 
D)  octahedral, weak, 3 
E)  octahedral, strong, 5 
A)  tetrahedral, weak, 3 
B)  tetrahedral, strong, 3 
C)  square planar, strong, 3 
D)  octahedral, weak, 3 
E)  octahedral, strong, 5

Question 14

Which of the following complexes has no geometric isomers?

Accepted Answer

A)  [Pt(NH3)4F2] 
B)  [Pt(NH3)F5]-3 
C)  [Co(NH3)4F2]+ 
D)  [Co(NH3)3F3] 
E)  [Co(NH3)2F4]- 
A)  [Pt(NH3)4F2] 
B)  [Pt(NH3)F5]-3 
C)  [Co(NH3)4F2]+ 
D)  [Co(NH3)3F3] 
E)  [Co(NH3)2F4]-

Question 15

Give the correct name for [Ni(NH3)4]2+.

Accepted Answer

A)  tetraamminonickelate(II) 
B)  nickel amine 
C)  tetraamminenickel(II) 
D)  nickel tetraamine 
E)  tetraamminonickel(4) 
A)  tetraamminonickelate(II) 
B)  nickel amine 
C)  tetraamminenickel(II) 
D)  nickel tetraamine 
E)  tetraamminonickel(4)

Question 16

Ligands approaching in an square planar pattern cause some orbitals to be raised in energy. How many orbitals are on the highest energy level?

Accepted Answer

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

Question 17

Choose the INCORRECT statement about coordination nomenclature.

Accepted Answer

A)  Molecular ligands carry the molecule's name. 
B)  The number of ligands is specified by a superscript. 
C)  Ligands are named in alphabetical order. 
D)  A Roman numeral designates the oxidation state of the metal ion. 
E)  Complex anions have an ate ending on the central metal's name. 
A)  Molecular ligands carry the molecule's name. 
B)  The number of ligands is specified by a superscript. 
C)  Ligands are named in alphabetical order. 
D)  A Roman numeral designates the oxidation state of the metal ion. 
E)  Complex anions have an ate ending on the central metal's name.

Question 18

[Cu(H2O)4]2+ absorbs light in the yellow part of the visible spectrum, thereby appearing to have the color ________.

Accepted Answer

A)  blue 
B)  cyan 
C)  green 
D)  purple 
E)  yellow 
A)  blue 
B)  cyan 
C)  green 
D)  purple 
E)  yellow

Question 19

Which of the following ligands exerts the strongest field?

Accepted Answer

A)  I- 
B)  H2O 
C)  ONO- 
D)  NH3 
E)  Br- 
A)  I- 
B)  H2O 
C)  ONO- 
D)  NH3 
E)  Br-

Question 20

The model for bonding in complex ions that considers the metal-ion/ligand bonding as an electrostatic attraction of the metal ion nucleus for ligand electrons, with repulsions between ligand electrons and the electrons of the central metal ion, is called the ________.

Accepted Answer

A)  atomic orbital theory 
B)  crystal field theory 
C)  complexation theory 
D)  molecular orbital theory 
E)  VSEPR theory 
A)  atomic orbital theory 
B)  crystal field theory 
C)  complexation theory 
D)  molecular orbital theory 
E)  VSEPR theory

Exam 24: Complex Ions and Coordination Compounds

What is the correct name of the following ion: [Zn(CN)4]2-

What is the approximate concentration of free Cu2+ remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M CuCl2 with 5.0 mL of 2.0 M ethylenediamine? [The net formation constant for the bis(ethylenediaminecopper(II) ion is 1 × 1020.]

The [Fe(CN)6]3- complex ion:

High spin refers to the maximum number of ligands attached to the metal ion.

A compound has the empirical formula CoCl3 ∙ 5NH3. One mole of it yields three moles of silver chloride when treated with silver nitrate. Ammonia is not removed by treatment with concentrated sulfuric acid. A reasonable formula for the compound is ________.

Which of the following ligands cannot act as a chelating agent?

What is the approximate concentration of free Fe2+ remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M FeSO4 with 5.0 mL of 2.0 M KCN? [The net formation constant for the hexacyanoferrate(II) ion is 1 × 1037.]

Choose the INCORRECT statement.

Ligands approaching in a tetrahedral pattern cause some orbitals to be raised in energy. How many orbitals are on the lower energy level?

Enantiomers are isomers which are not chiral.

What is the correct IUPAC name for [Co(NH3)6]2+?

The overall formation constant can be calculated by multiplying the constant for each step of the formation.

Choose the correct shape, weak or strong field, and number of unpaired electrons for [Co(ox)3]4-.

Which of the following complexes has no geometric isomers?

Give the correct name for [Ni(NH3)4]2+.

Ligands approaching in an square planar pattern cause some orbitals to be raised in energy. How many orbitals are on the highest energy level?

Choose the INCORRECT statement about coordination nomenclature.

[Cu(H2O)4]2+ absorbs light in the yellow part of the visible spectrum, thereby appearing to have the color ________.

Which of the following ligands exerts the strongest field?

The model for bonding in complex ions that considers the metal-ion/ligand bonding as an electrostatic attraction of the metal ion nucleus for ligand electrons, with repulsions between ligand electrons and the electrons of the central metal ion, is called the ________.

Matter - Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Additional Aspects

Intermolecular Forces: Liquids and Solids

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements I: Groups 1, 2, 13, and 14

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The Transition Elements

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

What is the approximate concentration of free Cu²⁺ remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M CuCl₂ with 5.0 mL of 2.0 M ethylenediamine? [The net formation constant for the bis(ethylenediaminecopper(II) ion is 1 × 10²⁰.]

A compound has the empirical formula CoCl₃ ∙ 5NH₃. One mole of it yields three moles of silver chloride when treated with silver nitrate. Ammonia is not removed by treatment with concentrated sulfuric acid. A reasonable formula for the compound is ________.

What is the approximate concentration of free Fe²⁺ remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M FeSO₄ with 5.0 mL of 2.0 M KCN? [The net formation constant for the hexacyanoferrate(II) ion is 1 × 10³⁷.]

What is the correct IUPAC name for [Co(NH₃)₆]²⁺?

Choose the correct shape, weak or strong field, and number of unpaired electrons for [Co(ox)₃]^4-.

Give the correct name for [Ni(NH₃)₄]²⁺.

[Cu(H₂O)₄]²⁺ absorbs light in the yellow part of the visible spectrum, thereby appearing to have the color ________.