Question 1

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 2

Ligands approaching in an octahedral pattern cause some orbitals to be raised in energy.How many orbitals are on the higher 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 3

Which of the following can function as a bidentate ligand?

Accepted Answer

A) CO   
B) OH - 
C) N H3  
D) C2O42-     
A) CO   
B) OH - 
C) N H3  
D) C2O42-

Question 4

What is the approximate concentration of free Cu2+(aq)remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M CuCl2(aq)with 5.0 mL of 2.0 M aqueous 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 5

Give the correct name for [AuF4]-.

Accepted Answer

A) gold fluoride 
B) tetrafluoroaurate(III) 
C) gold tetrafluoride 
D) tetrafluorogold(III) 
E) tetrafluoride gold 
A) gold fluoride 
B) tetrafluoroaurate(III) 
C) gold tetrafluoride 
D) tetrafluorogold(III) 
E) tetrafluoride gold

Question 6

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 7

Which of the following is a bidentate ligand?

Accepted Answer

A) H2O 
B) NO2-  
C) NH3  
D) H2NCH2CH2NH2  
E) [(O2
C) 2NCH2CH2N(CO2)2]4-  
A) H2O 
B) NO2-  
C) NH3  
D) H2NCH2CH2NH2  
E) [(O2
C) 2NCH2CH2N(CO2)2]4-

Question 8

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 9

Choose the correct shape,weak or strong field,and number of unpaired electrons for [Co(NH3)6]3+.

Accepted Answer

A) square planar,strong,6 
B) square planar,weak,0 
C) tetrahedral,strong,0 
D) octahedral,strong,0 
E) octahedral,weak,6 
A) square planar,strong,6 
B) square planar,weak,0 
C) tetrahedral,strong,0 
D) octahedral,strong,0 
E) octahedral,weak,6

Question 10

Write the correct formula for tetrachloroplatinate (II)ion.

Accepted Answer

A) [PtCl4]2-  
B) PtCl3Cl 
C) [Pt4Cl]-  
D) [PtCl3]-Cl-  
E) [PtCl2]42+  
A) [PtCl4]2-  
B) PtCl3Cl 
C) [Pt4Cl]-  
D) [PtCl3]-Cl-  
E) [PtCl2]42+

Question 11

In the cation [CoCl2(en)2]+,the oxidation state of cobalt and its coordination number,respectively,are ________.

Accepted Answer

A) -3 and two 
B) +2 and six 
C) +4 and four 
D) +3 and six 
E) -4 and six 
A) -3 and two 
B) +2 and six 
C) +4 and four 
D) +3 and six 
E) -4 and six

Question 12

As ethylenediamine is added to an aqueous solution of [Ni(H2O)6]2+,the water molecules are replaced two at a time by ethylenediamine to produce the sequence of ions: [Ni(H2O)6]2+,[Ni(en)(H2O)4]2+, [Ni(en)2(H2O)2]2+,and [Ni(en)3]2+.How does the color change through the sequence?

Accepted Answer

A) The color changes toward red with the addition of ethylenediamine. 
B) The color changes toward purple with the addition of ethylenediamine. 
C) Red,yellow,purple,blue with the addition of ethylenediamine. 
D) There is no color change with the addition of ethylenediamine. 
E) The color change cannot be predicted with the addition of ethylenediamine. 
A) The color changes toward red with the addition of ethylenediamine. 
B) The color changes toward purple with the addition of ethylenediamine. 
C) Red,yellow,purple,blue with the addition of ethylenediamine. 
D) There is no color change with the addition of ethylenediamine. 
E) The color change cannot be predicted with the addition of ethylenediamine.

Question 13

A compound has the empirical formula CoCl3 ∙ 5NH3.One mole of it yields two 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 14

Which one of the following could be a chelating ligand?

Accepted Answer

A) NH3  
B) CH3-CH2-NH2  
C) NH2-CH2-CH2-NH2  
D) CN-  
E) any metal ion 
A) NH3  
B) CH3-CH2-NH2  
C) NH2-CH2-CH2-NH2  
D) CN-  
E) any metal ion

Question 15

Of the following complex ions: [CoCl(NH3)5]2+, [Co(NH3)6]3+,[Co(en)3]3+,[Co(H2O)6]3+,one appears pink,two are yellow,and one blue.Which is blue?

Accepted Answer

A) [Co(NH3)6]3+ 
B) [CoCl(NH3)5]2+ 
C) [Co(H2O)6]3+ 
D) [Co(en)3]3+ 
E) both [Co(en)3]3+ and [Co(H2O)6]3+ 
A) [Co(NH3)6]3+ 
B) [CoCl(NH3)5]2+ 
C) [Co(H2O)6]3+ 
D) [Co(en)3]3+ 
E) both [Co(en)3]3+ and [Co(H2O)6]3+

Question 16

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 17

The two different compounds [Cu(NH3)4][Fe(CN)4(H2O)2] and [Cu(CN)4]Fe(NH3)4(H2O)2] are examples of ________.

Accepted Answer

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

Question 18

Which of the following ligand names is INCORRECT?

Accepted Answer

A) F-/fluoro 
B) OH-/hydroxo 
C) NH3/ammino 
D) NO2-/nitrito 
E) SO42-/sulfato 
A) F-/fluoro 
B) OH-/hydroxo 
C) NH3/ammino 
D) NO2-/nitrito 
E) SO42-/sulfato

Question 19

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 20

Complex-ion formation can be described in terms of Br∅nsted-Lowry acid-base reactions.

Accepted Answer

A) True 
 B)False

Exam 24: Complex Ions and Coordination Compounds

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 higher energy level?

Which of the following can function as a bidentate ligand?

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

Give the correct name for [AuF4]-.

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

Which of the following is a bidentate ligand?

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

Choose the correct shape,weak or strong field,and number of unpaired electrons for [Co(NH3)6]3+.

Write the correct formula for tetrachloroplatinate (II)ion.

In the cation [CoCl2(en)2]+,the oxidation state of cobalt and its coordination number,respectively,are ________.

As ethylenediamine is added to an aqueous solution of [Ni(H2O)6]2+,the water molecules are replaced two at a time by ethylenediamine to produce the sequence of ions: [Ni(H2O)6]2+,[Ni(en)(H2O)4]2+, [Ni(en)2(H2O)2]2+,and [Ni(en)3]2+.How does the color change through the sequence?

A compound has the empirical formula CoCl3 ∙ 5NH3.One mole of it yields two 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 one of the following could be a chelating ligand?

Of the following complex ions: [CoCl(NH3)5]2+, [Co(NH3)6]3+,[Co(en)3]3+,[Co(H2O)6]3+,one appears pink,two are yellow,and one blue.Which is blue?

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

The two different compounds [Cu(NH3)4][Fe(CN)4(H2O)2] and [Cu(CN)4]Fe(NH3)4(H2O)2] are examples of ________.

Which of the following ligand names is INCORRECT?

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

Complex-ion formation can be described in terms of Br∅nsted-Lowry acid-base reactions.

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: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

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

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

Give the correct name for [AuF₄]^-.

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

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

Choose the correct shape,weak or strong field,and number of unpaired electrons for [Co(NH₃)₆]³⁺.

In the cation [CoCl₂(en)₂]⁺,the oxidation state of cobalt and its coordination number,respectively,are ________.

A compound has the empirical formula CoCl₃ ∙ 5NH₃.One mole of it yields two 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 ________.

Of the following complex ions: [CoCl(NH₃)₅]^2+,[Co(NH₃)₆]³⁺,[Co(en)₃]³⁺,[Co(H₂O)₆]³⁺,one appears pink,two are yellow,and one blue.Which is blue?

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

The two different compounds [Cu(NH₃)₄][Fe(CN)₄(H₂O)₂] and [Cu(CN)₄]Fe(NH₃)4(H₂O)₂] are examples of ________.