Question 1

The difference between coordination of Co2+ with NO2- by an oxygen-cobalt bonding compared to a nitrogen-cobalt bonding results in ________.

Accepted Answer

A)  coordination isomers 
B)  geometric isomers 
C)  ionization isomers 
D)  linkage isomers 
E)  optical isomers 
A)  coordination isomers 
B)  geometric isomers 
C)  ionization isomers 
D)  linkage isomers 
E)  optical isomers

Question 2

Which of the following ions is highest in the spectrochemical series: NO2-, NH3, Br-, ox2-, H2O

Accepted Answer

A)  ox2- 
B)  Br- 
C)  H2O 
D)  NO2- 
E)  NH3 
A)  ox2- 
B)  Br- 
C)  H2O 
D)  NO2- 
E)  NH3

Question 3

The correct name for [Ag(NH3)2]+ is ________.

Accepted Answer

A)  silver amide 
B)  diamminesilver(I)ion 
C)  silver ammoniate 
D)  silver nitride 
E)  silver(I) diammine ion 
A)  silver amide 
B)  diamminesilver(I)ion 
C)  silver ammoniate 
D)  silver nitride 
E)  silver(I) diammine ion

Question 4

Choose the INCORRECT statement about isomers.

Accepted Answer

A)  Structural isomers differ in structure or bond type. 
B)  stereoisomers differ in the spatial arrangements among the ligands. 
C)  Ionization isomers differ in the charge on the central ion. 
D)  Linkage isomers differ in which atom is bonded to the central atom. 
E)  Geometric isomerism is cis-trans isomerism. 
A)  Structural isomers differ in structure or bond type. 
B)  stereoisomers differ in the spatial arrangements among the ligands. 
C)  Ionization isomers differ in the charge on the central ion. 
D)  Linkage isomers differ in which atom is bonded to the central atom. 
E)  Geometric isomerism is cis-trans isomerism.

Question 5

If it is assumed that [Fe(H2O)6]3+ can lose two hydrogens, what is the formula of the resulting ion when Fe3+ is placed in water?

Accepted Answer

A)  [Fe(H2O)2](OH)2]2- 
B)  [Fe(OH)(H2O)5]2+ 
C)  [Fe(OH)2(H2O)4]2+ 
D)  [Fe(OH)2(H2O)4]+ 
E)  [Fe(OH)2(H2O)4]2- 
A)  [Fe(H2O)2](OH)2]2- 
B)  [Fe(OH)(H2O)5]2+ 
C)  [Fe(OH)2(H2O)4]2+ 
D)  [Fe(OH)2(H2O)4]+ 
E)  [Fe(OH)2(H2O)4]2-

Question 6

Choose the INCORRECT formula/name combination for ligands.

Accepted Answer

A)  -O2C-CO2- oxalato (ox) 
B)  S2O32- thiosulfato 
C)  CH3NH2 ammino 
D)  SCN- bonded to S thiocyanato-S- 
E)  NCS- bonded to N thiocyanato-N- 
A)  -O2C-CO2- oxalato (ox) 
B)  S2O32- thiosulfato 
C)  CH3NH2 ammino 
D)  SCN- bonded to S thiocyanato-S- 
E)  NCS- bonded to N thiocyanato-N-

Question 7

Which element possesses the smallest number of unpaired electrons?

Accepted Answer

A)  Co 
B)  Cr 
C)  Cu 
D)  Mn 
E)  Fe 
A)  Co 
B)  Cr 
C)  Cu 
D)  Mn 
E)  Fe

Question 8

Which of the following magnetic/geometric descriptions is most likely for the [ZnCl4]2- ion?

Accepted Answer

A)  diamagnetic/octahedral 
B)  paramagnetic/tetrahedral 
C)  paramagnetic/square planar 
D)  diamagnetic/tetrahedral 
E)  diamagnetic/square planar 
A)  diamagnetic/octahedral 
B)  paramagnetic/tetrahedral 
C)  paramagnetic/square planar 
D)  diamagnetic/tetrahedral 
E)  diamagnetic/square planar

Question 9

Why is an aqueous solution of Fe3+ acidic?

Accepted Answer

A)  Iron ions attract hydroxide ions from water leaving hydrogen ions. 
B)  Iron ions react with water to produce hydrogen ions. 
C)  Iron ions attract water molecules to form a complex. 
D)  Iron ions form a complex with water then lose hydrogen ions from its water ligands. 
E)  Iron ions force the dissociation of water. 
A)  Iron ions attract hydroxide ions from water leaving hydrogen ions. 
B)  Iron ions react with water to produce hydrogen ions. 
C)  Iron ions attract water molecules to form a complex. 
D)  Iron ions form a complex with water then lose hydrogen ions from its water ligands. 
E)  Iron ions force the dissociation of water.

Question 10

Choose the correct shape, weak or strong field, and number of unpaired electrons for [Ni(C2O4)3]4-.

Accepted Answer

A)  square planar, strong, 4 
B)  octahedral, weak, 2 
C)  square planar, weak, 0 
D)  tetrahedral, weak, 0 
E)  octahedral, weak, 3 
A)  square planar, strong, 4 
B)  octahedral, weak, 2 
C)  square planar, weak, 0 
D)  tetrahedral, weak, 0 
E)  octahedral, weak, 3

Question 11

Ligands approaching in an octahedral 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 12

What is the concentration of Cu2+ if 0.235 g of CuCl2 is dissolved in 300.0 mL of 0.550 M NH3? Kf ([Cu(NH3)4]2+) = 1.1 × 1013

Accepted Answer

A)  5.8 × 10-15 M 
B)  1.0 × 10-15 M 
C)  6.9 × 10-15 M 
D)  5.8 × 10-3 M 
E)  1.2 × 10-12 M 
A)  5.8 × 10-15 M 
B)  1.0 × 10-15 M 
C)  6.9 × 10-15 M 
D)  5.8 × 10-3 M 
E)  1.2 × 10-12 M

Question 13

Choose the correct shape, weak or strong field, and number of unpaired electrons for [CoCl4]2-.

Accepted Answer

A)  square planar, strong, 3 
B)  square planar, strong, 0 
C)  tetrahedral, strong, 1 
D)  tetrahedral, weak, 3 
E)  square planar, weak, 0 
A)  square planar, strong, 3 
B)  square planar, strong, 0 
C)  tetrahedral, strong, 1 
D)  tetrahedral, weak, 3 
E)  square planar, weak, 0

Question 14

Choose the correct shape, weak or strong field, and number of unpaired electrons for [CoI6]3-.

Accepted Answer

A)  tetrahedral, strong, 2 
B)  tetrahedral, weak, 4 
C)  square planar, strong, 0 
D)  octahedral, strong, 5 
E)  octahedral, weak, 4 
A)  tetrahedral, strong, 2 
B)  tetrahedral, weak, 4 
C)  square planar, strong, 0 
D)  octahedral, strong, 5 
E)  octahedral, weak, 4

Question 15

Chlorophyll is a green pigment involved in the growth of plants. One type of chlorophyll is a complex. What color of light should plants grow best in?

Accepted Answer

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

Question 16

Choose the correct shape, weak or strong field, and number of unpaired electrons for [PtCl6]2-.

Accepted Answer

A)  square planar, weak, 0 
B)  square planar, strong, 4 
C)  tetrahedral, weak, 0 
D)  octahedral, weak, 1 
E)  octahedral, weak, 4 
A)  square planar, weak, 0 
B)  square planar, strong, 4 
C)  tetrahedral, weak, 0 
D)  octahedral, weak, 1 
E)  octahedral, weak, 4

Question 17

In the compound K4[Fe(CN)6], the oxidation state of iron and its coordination number, respectively, are ________.

Accepted Answer

A)  -4 and ten 
B)  0 and ten 
C)  +4 and four 
D)  +2 and six 
E)  -4 and six 
A)  -4 and ten 
B)  0 and ten 
C)  +4 and four 
D)  +2 and six 
E)  -4 and six

Question 18

Choose the INCORRECT formula/name combination for ligands.

Accepted Answer

A)  O2- hydroxo 
B)  NO nitrosyl 
C)  I- iodo 
D)  CN- cyano 
E)  SO42- sulfato 
A)  O2- hydroxo 
B)  NO nitrosyl 
C)  I- iodo 
D)  CN- cyano 
E)  SO42- sulfato

Question 19

Coordination isomerism could be shown by ________.

Accepted Answer

A)  Li[AlH4] 
B)  [Ag(NH3)2][CuCl2] 
C)  [Co(NH3)4Cl2]Br 
D)  [Pt(H2O)4Cl2] 
E)  [Fe(CN)6](NH3)3 
A)  Li[AlH4] 
B)  [Ag(NH3)2][CuCl2] 
C)  [Co(NH3)4Cl2]Br 
D)  [Pt(H2O)4Cl2] 
E)  [Fe(CN)6](NH3)3

Question 20

Using the stepwise formation constants given, calculate the net formation constant for the [Cu(H2NCH2CH2NH2)2]2+ complex. Cu2+ + en → [Cu(en)]2+ K1 = 5.2 × 1010
[Cu(en)]2+ + en → [Cu(en)2]2+ K2 = 2.0 × 109

Accepted Answer

A)  2.6 × 101 
B)  2.5 × 109 
C)  5.4 × 1010 
D)  7.9 × 1019 
E)  1.0 × 1020 
A)  2.6 × 101 
B)  2.5 × 109 
C)  5.4 × 1010 
D)  7.9 × 1019 
E)  1.0 × 1020

Exam 24: Complex Ions and Coordination Compounds

The difference between coordination of Co2+ with NO2- by an oxygen-cobalt bonding compared to a nitrogen-cobalt bonding results in ________.

Which of the following ions is highest in the spectrochemical series: NO2-, NH3, Br-, ox2-, H2O

The correct name for [Ag(NH3)2]+ is ________.

Choose the INCORRECT statement about isomers.

If it is assumed that [Fe(H2O)6]3+ can lose two hydrogens, what is the formula of the resulting ion when Fe3+ is placed in water?

Choose the INCORRECT formula/name combination for ligands.

Which element possesses the smallest number of unpaired electrons?

Which of the following magnetic/geometric descriptions is most likely for the [ZnCl4]2- ion?

Why is an aqueous solution of Fe3+ acidic?

Choose the correct shape, weak or strong field, and number of unpaired electrons for [Ni(C2O4)3]4-.

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

What is the concentration of Cu2+ if 0.235 g of CuCl2 is dissolved in 300.0 mL of 0.550 M NH3? Kf ([Cu(NH3)4]2+) = 1.1 × 1013

Choose the correct shape, weak or strong field, and number of unpaired electrons for [CoCl4]2-.

Choose the correct shape, weak or strong field, and number of unpaired electrons for [CoI6]3-.

Chlorophyll is a green pigment involved in the growth of plants. One type of chlorophyll is a complex. What color of light should plants grow best in?

Choose the correct shape, weak or strong field, and number of unpaired electrons for [PtCl6]2-.

In the compound K4[Fe(CN)6], the oxidation state of iron and its coordination number, respectively, are ________.

Choose the INCORRECT formula/name combination for ligands.

Coordination isomerism could be shown by ________.

Using the stepwise formation constants given, calculate the net formation constant for the [Cu(H2NCH2CH2NH2)2]2+ complex. Cu2+ + en → [Cu(en)]2+ K1 = 5.2 × 1010 [Cu(en)]2+ + en → [Cu(en)2]2+ K2 = 2.0 × 109

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

The difference between coordination of Co²⁺ with NO₂^- by an oxygen-cobalt bonding compared to a nitrogen-cobalt bonding results in ________.

Which of the following ions is highest in the spectrochemical series: NO^2-, NH₃, Br^-, ox^2-, H₂O

The correct name for [Ag(NH₃)₂]⁺ is ________.

If it is assumed that [Fe(H₂O)₆]³⁺ can lose two hydrogens, what is the formula of the resulting ion when Fe³⁺ is placed in water?

Which of the following magnetic/geometric descriptions is most likely for the [ZnCl₄]^2- ion?

Why is an aqueous solution of Fe³⁺ acidic?

Choose the correct shape, weak or strong field, and number of unpaired electrons for [Ni(C₂O₄)₃]^4-.

What is the concentration of Cu²⁺ if 0.235 g of CuCl₂ is dissolved in 300.0 mL of 0.550 M NH₃? Kf ([Cu(NH₃)₄]²⁺) = 1.1 × 10¹³

Choose the correct shape, weak or strong field, and number of unpaired electrons for [CoCl₄]^2-.

Using the stepwise formation constants given, calculate the net formation constant for the [Cu(H₂NCH₂CH₂NH₂)₂]²⁺ complex. Cu²⁺ + en → [Cu(en)]₂+ K₁ = 5.2 × 10¹⁰ [Cu(en)]²⁺ + en → [Cu(en)₂]₂+ K₂ = 2.0 × 109