Question 1

Give the correct name for [Fe(CO)4].

Accepted Answer

A) tetracarbonyliron(0) 
B) iron carbon monoxide 
C) carbonylferrate(IV) 
D) tetracarbonylferrate(0) 
E) iron carbonyl 
A) tetracarbonyliron(0) 
B) iron carbon monoxide 
C) carbonylferrate(IV) 
D) tetracarbonylferrate(0) 
E) iron carbonyl

Question 2

When [Ni(NH3)4]2+ is treated with concentrated HCl(aq),two compounds having the same formula,[Ni(NH3)4Cl2],designated I and II,are formed.Compound I can be converted to compound II by boiling it in dilute HCl(aq).A solution of I reacts with oxalic acid,H2C2O4,to form [Ni(NH3)4(C2O4)].Compound II does not react with oxalic acid.Compound II is:

Accepted Answer

A) the cis isomer 
B) tetrahedral in shape 
C) the trans isomer 
D) the same as compound I 
E) octahedral in shape 
A) the cis isomer 
B) tetrahedral in shape 
C) the trans isomer 
D) the same as compound I 
E) octahedral in shape

Question 3

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 4

Choose the INCORRECT statement.

Accepted Answer

A) A ligand that bonds to the metal ion with more than one atom is unidentate. 
B) A chelate is produced by a ligand bonding to the metal ion with two or more donor atoms. 
C) In coordination nomenclature,the cations are named before the anions. 
D) In coordination nomenclature,the names of the ligands are followed by the name of the central metal ion. 
E) Anionic ligands end in -o in coordination nomenclature. 
A) A ligand that bonds to the metal ion with more than one atom is unidentate. 
B) A chelate is produced by a ligand bonding to the metal ion with two or more donor atoms. 
C) In coordination nomenclature,the cations are named before the anions. 
D) In coordination nomenclature,the names of the ligands are followed by the name of the central metal ion. 
E) Anionic ligands end in -o in coordination nomenclature.

Question 5

The compound PtCl2(en)2 [en = H2NCH2NH2] is octahedral;therefore we know that:

Accepted Answer

A) en must be a monodentate ligand 
B) two moles of Cl- per mole of PtCl2(en)2 can be precipitated rapidly by the addition of Ag+  
C) the molecule is nonpolar 
D) the compound can have cis and trans isomers 
E) Pt always has a coordination of 4 
A) en must be a monodentate ligand 
B) two moles of Cl- per mole of PtCl2(en)2 can be precipitated rapidly by the addition of Ag+  
C) the molecule is nonpolar 
D) the compound can have cis and trans isomers 
E) Pt always has a coordination of 4

Question 6

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

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

Choose the correct statement about isomers of [Pt(H2O)2(NH3)Cl]Br.

Accepted Answer

A) I is cis,II is trans. 
B) The two molecules are the same. 
C) The two molecules are the same but one is turned over. 
D) They are not isomers. 
E) I is trans,II is cis. 
A) I is cis,II is trans. 
B) The two molecules are the same. 
C) The two molecules are the same but one is turned over. 
D) They are not isomers. 
E) I is trans,II is cis.

Question 9

What is the approximate concentration of free Ni2+(aq)remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M NiCl2(aq)with 5.0 mL of 2.00 M aqeous ethylenediamine? 
[The net formation constant for the tris(ethylenediaminenickel(II)ion is 2.1 × 1018.]

Accepted Answer

A) 0.050 M 
B) 1.4 × 10-19 M 
C) 4.8 × 10-19 M 
D) 3.9 × 10-20 M 
E) 2.8 × 10-20 M 
A) 0.050 M 
B) 1.4 × 10-19 M 
C) 4.8 × 10-19 M 
D) 3.9 × 10-20 M 
E) 2.8 × 10-20 M

Question 10

Based on concepts from both crystal field theory and valence bond theory,the most likely combination of molecular orbital,magnetic and geometric descriptions for the [Fe(H2O)6]2+ ion is ________.

Accepted Answer

A) sp2d/diamagnetic/square planar 
B) sp2d/paramagnetic/square planar 
C) sp3d2/diamagnetic/octahedral 
D) sp3d2/paramagnetic/octahedral 
E) sp2d/paramagnetic/tetrahedral 
A) sp2d/diamagnetic/square planar 
B) sp2d/paramagnetic/square planar 
C) sp3d2/diamagnetic/octahedral 
D) sp3d2/paramagnetic/octahedral 
E) sp2d/paramagnetic/tetrahedral

Question 11

The hexaaquachromium(III)ion absorbs light in the green 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 12

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 13

A complex is any species involving coordination of ligands to a metal center.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following species is diamagnetic?

Accepted Answer

A) an isolated gas-phase Cr3+ ion 
B) a high-spin octahedral Cr2+ complex 
C) an isolated gas-phase Cu2+ ion 
D) a low-spin octahedral Co3+ complex 
A) an isolated gas-phase Cr3+ ion 
B) a high-spin octahedral Cr2+ complex 
C) an isolated gas-phase Cu2+ ion 
D) a low-spin octahedral Co3+ complex

Question 15

Unpaired electrons cause a complex ion to be diamagnetic.

Accepted Answer

A) True 
 B)False

Question 16

Which combination of central species and net charge is FALSE for complex ions or coordination compounds?

Accepted Answer

A) neutral metal atom,positive net charge 
B) neutral metal atom,zero net charge 
C) metal cation,zero net charge 
D) metal cation,positive net charge 
E) metal cation,negative net charge 
A) neutral metal atom,positive net charge 
B) neutral metal atom,zero net charge 
C) metal cation,zero net charge 
D) metal cation,positive net charge 
E) metal cation,negative net charge

Question 17

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 18

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

Question 19

If a central ion has a coordination number of 4 we might expect the geometry of the complex ion to be ________.

Accepted Answer

A) octahedral 
B) cubical 
C) trigonal bipyramidal 
D) square planar 
E) trigonal planar 
A) octahedral 
B) cubical 
C) trigonal bipyramidal 
D) square planar 
E) trigonal planar

Question 20

Complex-ions in which ligands are interchanged very slowly are called labile.

Accepted Answer

A) True 
 B)False

Exam 24: Complex Ions and Coordination Compounds

Give the correct name for [Fe(CO)4].

Which of the following ligands exerts the strongest field?

Choose the INCORRECT statement.

The compound PtCl2(en)2 [en = H2NCH2NH2] is octahedral;therefore we know that:

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 ________.

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

Choose the correct statement about isomers of [Pt(H2O)2(NH3)Cl]Br.

What is the approximate concentration of free Ni2+(aq)remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M NiCl2(aq)with 5.0 mL of 2.00 M aqeous ethylenediamine? [The net formation constant for the tris(ethylenediaminenickel(II)ion is 2.1 × 1018.]

Based on concepts from both crystal field theory and valence bond theory,the most likely combination of molecular orbital,magnetic and geometric descriptions for the [Fe(H2O)6]2+ ion is ________.

The hexaaquachromium(III)ion absorbs light in the green part of the visible spectrum,thereby appearing to have the color:

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

A complex is any species involving coordination of ligands to a metal center.

Which of the following species is diamagnetic?

Unpaired electrons cause a complex ion to be diamagnetic.

Which combination of central species and net charge is FALSE for complex ions or coordination compounds?

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

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

If a central ion has a coordination number of 4 we might expect the geometry of the complex ion to be ________.

Complex-ions in which ligands are interchanged very slowly are called labile.

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

Give the correct name for [Fe(CO)₄].

The compound PtCl₂(en)₂ [en = H₂NCH₂NH₂] is octahedral;therefore we know that:

Choose the correct statement about isomers of [Pt(H₂O)₂(NH₃)Cl]Br.

What is the approximate concentration of free Ni²⁺(aq)remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M NiCl₂(aq)with 5.0 mL of 2.00 M aqeous ethylenediamine? [The net formation constant for the tris(ethylenediaminenickel(II)ion is 2.1 × 10¹⁸.]

Based on concepts from both crystal field theory and valence bond theory,the most likely combination of molecular orbital,magnetic and geometric descriptions for the [Fe(H₂O)₆]²⁺ ion is ________.

The [Fe(CN)₆]^3- complex ion:

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