Question 1

How many iron atoms are coordinated in a hemoglobin molecule ?

Accepted Answer

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

Question 2

The coordination sphere of a complex consists of _ .

Accepted Answer

A)  the primary and secondary valencies 
B)  the central metal ion and the ligands bonded to it 
C)  coordination and steric numbers 
D)  the central metal ion only 
E)  the ligands 
A)  the primary and secondary valencies 
B)  the central metal ion and the ligands bonded to it 
C)  coordination and steric numbers 
D)  the central metal ion only 
E)  the ligands

Question 3

Transition metal ions with empty valence orbitals act as .

Accepted Answer

The answer of Transition metal ions with empty valence orbitals...

Question 4

Which one of the following complex ions will be paramagnetic?

Accepted Answer

A)  [Zn(H2O)4]2+ 
B)  [Co(H2O)6]3+ (low spin) 
C)  [Fe(H2O)6]3+ (low spin) 
D)  [Fe(H2O)6]2+ (low spin) 
E)  [Zn(NH3)4]2+ 
A)  [Zn(H2O)4]2+ 
B)  [Co(H2O)6]3+ (low spin) 
C)  [Fe(H2O)6]3+ (low spin) 
D)  [Fe(H2O)6]2+ (low spin) 
E)  [Zn(NH3)4]2+

Question 5

The names of complex anions end in .

Accepted Answer

A)  - ate 
B)  - ic 
C)  - o 
D)  - ium 
E)  - ous 
A)  - ate 
B)  - ic 
C)  - o 
D)  - ium 
E)  - ous

Question 6

The chelate effect is best attributed to considerations of which type?

Accepted Answer

A)  entropy 
B)  hydrogen bonding 
C)  enthalpy 
D)  resonance 
E)  hydration 
A)  entropy 
B)  hydrogen bonding 
C)  enthalpy 
D)  resonance 
E)  hydration

Question 7

What transition metal is responsible for the color of topaz _?

Accepted Answer

A)  manganese 
B)  iron 
C)  cobalt 
D)  gold 
E)  chromium 
A)  manganese 
B)  iron 
C)  cobalt 
D)  gold 
E)  chromium

Question 8

Which of the following cannot form both high- and low- spin octahedral complexes?

Accepted Answer

A)  Mn2+ 
B)  Co3+ 
C)  V2+ 
D)  Cr2+ 
E)  All of the above can form both high- and low- spin complexes. 
A)  Mn2+ 
B)  Co3+ 
C)  V2+ 
D)  Cr2+ 
E)  All of the above can form both high- and low- spin complexes.

Question 9

The most common coordination numbers are _ .

Accepted Answer

The answer of The most common coordination numbers are _...

Question 10

The correct name for Na3[CoF6] is .

Accepted Answer

A)  trisodium hexakisfluorocobalt(III) 
B)  sodium hexafluorocobaltate(IV) 
C)  trisodium hexakisfluorocobalt(II) 
D)  trisodium hexakisfluorocobalt(IV) 
E)  sodium hexafluorocobaltate(III) 
A)  trisodium hexakisfluorocobalt(III) 
B)  sodium hexafluorocobaltate(IV) 
C)  trisodium hexakisfluorocobalt(II) 
D)  trisodium hexakisfluorocobalt(IV) 
E)  sodium hexafluorocobaltate(III)

Question 11

Using the following abbreviated spectrochemical series, determine which complex ion is most likely to absorb light in the red region of the visible spectrum.

Accepted Answer

A)  [Cu(H2O)4]2+ 
B)  [CuCl4]2- 
C)  [Cu(CN)4]2- 
D)  [Cu(NH3)4]2+ 
E)  not enough information given to determine 
A)  [Cu(H2O)4]2+ 
B)  [CuCl4]2- 
C)  [Cu(CN)4]2- 
D)  [Cu(NH3)4]2+ 
E)  not enough information given to determine

Question 12

Trans- [Fe(H2O)2Cl4]2- must be .

Accepted Answer

A)  trigonal bipyramidal 
B)  tetrahedral 
C)  square planar 
D)  octahedral 
E)  linear 
A)  trigonal bipyramidal 
B)  tetrahedral 
C)  square planar 
D)  octahedral 
E)  linear

Question 13

Does either or both cis- or trans- [Mn(en)2Br2] have optical isomers?

Accepted Answer

A)  cis only 
B)  trans only 
C)  both cis and trans 
D)  neither cis nor trans 
E)  [Mn(en)2Br2] does not exhibit cis- trans- isomerism. 
A)  cis only 
B)  trans only 
C)  both cis and trans 
D)  neither cis nor trans 
E)  [Mn(en)2Br2] does not exhibit cis- trans- isomerism.

Question 14

What is the purpose of adding EDTA to prepared foods?

Accepted Answer

A)  to complex trace metal ions that catalyze decomposition reactions 
B)  to keep ions such as Ca2+ in solution so the foods look good 
C)  to complex iron(III) ions so they can catalyze protein decomposition on cooking 
D)  to aid in browning of the surface during cooking 
E)  to prevent dissolution of the container in the food when stored for long periods of time 
A)  to complex trace metal ions that catalyze decomposition reactions 
B)  to keep ions such as Ca2+ in solution so the foods look good 
C)  to complex iron(III) ions so they can catalyze protein decomposition on cooking 
D)  to aid in browning of the surface during cooking 
E)  to prevent dissolution of the container in the food when stored for long periods of time

Question 15

Werner's theory of primary and secondary valences for transition metal complexes has given us the concepts of and .

Accepted Answer

oxidation

Question 16

What are the donor atoms in ferrichrome and how many of them are in one molecule?

Accepted Answer

A)  Cr, 5 
B)  Fe, 4 
C)  N, 4 
D)  O, 6 
E)  S, 6 
A)  Cr, 5 
B)  Fe, 4 
C)  N, 4 
D)  O, 6 
E)  S, 6

Question 17

Based on electron configuration, which is most likely colorless?

Accepted Answer

A)  [Ni(NH3)6]2+ 
B)  [Cd(NH3)4]2+ 
C)  [Cu(NH3)4]2+ 
D)  [Co(NH3)6]2+ 
E)  [Cr(NH3)5Cl]2+ 
A)  [Ni(NH3)6]2+ 
B)  [Cd(NH3)4]2+ 
C)  [Cu(NH3)4]2+ 
D)  [Co(NH3)6]2+ 
E)  [Cr(NH3)5Cl]2+

Question 18

Based on entropy considerations alone, which homogeneous aqueous equilibrium would be expected to lie to the right?

Accepted Answer

A)  AgI2-  + 2Br-   AgBr2-  + 2I- 
B)  Fe(NH3)62+  + C20H10N42-   Fe(NH3)2(C20H10N4) + 4NH3 
C)  CoCl42+  + 6H2O  Co(H2O)62+ + 4Cl- 
D)  Ni(H2NC2H4NH2)32+  + 6NH3   Ni(NH3)62+  + 3H2NC2H4NH2 
E)  Cu(NH3)42+  + 6H2O  Cu( H2O)62+  + 4NH3 
A)  AgI2-  + 2Br-   AgBr2-  + 2I- 
B)  Fe(NH3)62+  + C20H10N42-   Fe(NH3)2(C20H10N4) + 4NH3 
C)  CoCl42+  + 6H2O  Co(H2O)62+ + 4Cl- 
D)  Ni(H2NC2H4NH2)32+  + 6NH3   Ni(NH3)62+  + 3H2NC2H4NH2 
E)  Cu(NH3)42+  + 6H2O  Cu( H2O)62+  + 4NH3

Question 19

How can high- spin and low- spin transition metal complexes be distinguished from each other?

Accepted Answer

Magnetic properties

Question 20

Define the chelate effect.

Accepted Answer

Chelate effect = an increased

Exam 24: Chemistry of Coordination Compounds

How many iron atoms are coordinated in a hemoglobin molecule ?

The coordination sphere of a complex consists of _ .

Transition metal ions with empty valence orbitals act as .

Which one of the following complex ions will be paramagnetic?

The names of complex anions end in .

The chelate effect is best attributed to considerations of which type?

What transition metal is responsible for the color of topaz _?

Which of the following cannot form both high- and low- spin octahedral complexes?

The most common coordination numbers are _ .

The correct name for Na3[CoF6] is .

Using the following abbreviated spectrochemical series, determine which complex ion is most likely to absorb light in the red region of the visible spectrum.

Trans- [Fe(H2O)2Cl4]2- must be .

Does either or both cis- or trans- [Mn(en)2Br2] have optical isomers?

What is the purpose of adding EDTA to prepared foods?

Werner's theory of primary and secondary valences for transition metal complexes has given us the concepts of and .

What are the donor atoms in ferrichrome and how many of them are in one molecule?

Based on electron configuration, which is most likely colorless?

Based on entropy considerations alone, which homogeneous aqueous equilibrium would be expected to lie to the right?

How can high- spin and low- spin transition metal complexes be distinguished from each other?

Define the chelate effect.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Intermolecular Forces, Liquids, and Solids

Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Metals and Metallurgy

The Chemistry of Life: Organic and Biological Chemistry

Filters

The correct name for Na₃[CoF₆] is .

Trans- [Fe(H₂O)₂Cl₄]²^-must be .

Does either or both cis- or trans- [Mn(en)₂Br₂] have optical isomers?