Question 1

What is the concentration of Zn2+(aq)if 0.254 g of ZnCl2(s)is dissolved in 200.0 mL of 2.00 M NH3(aq)?
Kf ([Zn(NH3)4]2+)= 4.1 × 108

Accepted Answer

A) 0.0093 M 
B) 1.5 × 10-12 M 
C) 2.4 × 10-9 M 
D) 2.3 × 10-12 M 
E) 0.0019 M 
A) 0.0093 M 
B) 1.5 × 10-12 M 
C) 2.4 × 10-9 M 
D) 2.3 × 10-12 M 
E) 0.0019 M

Question 2

What is the correct IUPAC name for K3[Co(NO2)6]?

Accepted Answer

A) tripotassiumhexanitritocobalt(0) 
B) tripotassiumhexanitritocobalt(III) 
C) potassium hexanitritocobaltate(III) 
D) potassium hexanitritocobalt(III) 
E) potassium hexanitratocobalt(III) 
A) tripotassiumhexanitritocobalt(0) 
B) tripotassiumhexanitritocobalt(III) 
C) potassium hexanitritocobaltate(III) 
D) potassium hexanitritocobalt(III) 
E) potassium hexanitratocobalt(III)

Question 3

Conductivity experiments indicate that dichlorotetraamine-palladium (IV)chloride is composed of 3 moles of ions per mole of compound.However,only 2 moles of AgCl per mole of compound are precipitated rapidly when silver nitrate solution is added to a solution of the palladium compound.What is the probable structure of the complex ion?

Accepted Answer

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

Question 4

Which of the following ions is highest in the spectrochemical series? en,I-,SCN-,OH-,CN-

Accepted Answer

A) en 
B) SCN- 
C) CN- 
D) OH- 
E) I- 
A) en 
B) SCN- 
C) CN- 
D) OH- 
E) I-

Question 5

Sequestering is using a chelating agents to reduce a free cation concentration to the point that the cation will not react to form objectionable products.

Accepted Answer

A) True 
 B)False

Question 6

Choose the INCORRECT formula/name combination for ligands.

Accepted Answer

A) C5H5N / pyridine 
B) F- / fluoro 
C) Cl- / chloro 
D) OH- / hydroxo 
E) I- / iodino 
A) C5H5N / pyridine 
B) F- / fluoro 
C) Cl- / chloro 
D) OH- / hydroxo 
E) I- / iodino

Question 7

Choose the correct shape,weak or strong field,and number of unpaired electrons for [Co(NH3)4]2+.

Accepted Answer

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

Question 8

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 9

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 10

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

Question 11

Choose the INCORRECT statement.

Accepted Answer

A) Structures that are nonsuperimposable mirror images are enantiomers. 
B) Enantiomers are chiral. 
C) Enantiomers are optical isomers. 
D) Hydrates are molecules which do not react with water. 
E) Coordination complexes add the ligands one at a time. 
A) Structures that are nonsuperimposable mirror images are enantiomers. 
B) Enantiomers are chiral. 
C) Enantiomers are optical isomers. 
D) Hydrates are molecules which do not react with water. 
E) Coordination complexes add the ligands one at a time.

Question 12

Choose the INCORRECT formula/name combination for ligands.

Accepted Answer

A) Br- / bromo 
B) S2O32- / sulfato 
C) NO2- bonded to N / nitrito-N- 
D) NO2- bonded to O / nitrito-O- 
E) en (ethylenediamine)/ N2NCH2CH2NH2  
A) Br- / bromo 
B) S2O32- / sulfato 
C) NO2- bonded to N / nitrito-N- 
D) NO2- bonded to O / nitrito-O- 
E) en (ethylenediamine)/ N2NCH2CH2NH2

Question 13

What is the concentration of Ni2+(aq)if 0.223 g of NiCl2(s)is dissolved in 250.0 mL of 0.760 M NH3(aq)?
Kf ([Ni(NH3)6]2+)= 5.5 × 108

Accepted Answer

A) 6.9 × 10-3 M 
B) 7.6 × 10-11 M 
C) 1.3 × 10-11 M 
D) 9.7 × 10-11 M 
E) 1.4 × 10-11 M 
A) 6.9 × 10-3 M 
B) 7.6 × 10-11 M 
C) 1.3 × 10-11 M 
D) 9.7 × 10-11 M 
E) 1.4 × 10-11 M

Question 14

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 15

It is known that the sulfhydryl group,-SH,forms strong coordinate bonds to certain heavy metal ions.Which of the following do you expect to be the best chelating agent for heavy metal ions?

Accepted Answer

A) HS-CH2-CH(SH)-CH2-OH 
B) H-SH 
C) CH3-SH 
D) CH3-S-S-CH3  
E) SO42- 
A) HS-CH2-CH(SH)-CH2-OH 
B) H-SH 
C) CH3-SH 
D) CH3-S-S-CH3  
E) SO42-

Question 16

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

Question 17

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 18

Which ion would you expect to have the largest crystal field splitting,△?

Accepted Answer

A) [Rh(CN)6]4- 
B) [Rh(CN)6]3- 
C) [Rh(H2O)6]2+ 
D) [Rh(H2O)6]3+ 
A) [Rh(CN)6]4- 
B) [Rh(CN)6]3- 
C) [Rh(H2O)6]2+ 
D) [Rh(H2O)6]3+

Question 19

The correct formula of triamminediaquachlorocobalt (III)iodide is ________.

Accepted Answer

A) [Co(NH3)2(H2O)3Cl]I2  
B) [Co(NH3)3(H2O)2Cl]I3  
C) [Co(NH3)3(H2O)2Cl]I2  
D) [Co(NH3)3(H2O)2Cl]I 
E) [Co(NH3)3(H2O)2I]Cl2  
A) [Co(NH3)2(H2O)3Cl]I2  
B) [Co(NH3)3(H2O)2Cl]I3  
C) [Co(NH3)3(H2O)2Cl]I2  
D) [Co(NH3)3(H2O)2Cl]I 
E) [Co(NH3)3(H2O)2I]Cl2

Question 20

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

Exam 24: Complex Ions and Coordination Compounds

What is the concentration of Zn2+(aq)if 0.254 g of ZnCl2(s)is dissolved in 200.0 mL of 2.00 M NH3(aq)? Kf ([Zn(NH3)4]2+)= 4.1 × 108

What is the correct IUPAC name for K3[Co(NO2)6]?

Which of the following ions is highest in the spectrochemical series? en,I-,SCN-,OH-,CN-

Sequestering is using a chelating agents to reduce a free cation concentration to the point that the cation will not react to form objectionable products.

Choose the INCORRECT formula/name combination for ligands.

Choose the correct shape,weak or strong field,and number of unpaired electrons for [Co(NH3)4]2+.

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

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

Choose the INCORRECT statement.

Choose the INCORRECT formula/name combination for ligands.

What is the concentration of Ni2+(aq)if 0.223 g of NiCl2(s)is dissolved in 250.0 mL of 0.760 M NH3(aq)? Kf ([Ni(NH3)6]2+)= 5.5 × 108

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

It is known that the sulfhydryl group,-SH,forms strong coordinate bonds to certain heavy metal ions.Which of the following do you expect to be the best chelating agent for heavy metal ions?

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

Why is an aqueous solution of Fe3+ acidic?

Which ion would you expect to have the largest crystal field splitting,△?

The correct formula of triamminediaquachlorocobalt (III)iodide is ________.

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

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

What is the concentration of Zn²⁺(aq)if 0.254 g of ZnCl₂(s)is dissolved in 200.0 mL of 2.00 M NH₃(aq)? K_f ([Zn(NH₃)₄]²⁺)= 4.1 × 10⁸

What is the correct IUPAC name for K₃[Co(NO₂)₆]?

Which of the following ions is highest in the spectrochemical series? en,I^-,SCN^-,OH^-,CN^-

Choose the correct shape,weak or strong field,and number of unpaired electrons for [Co(NH₃)₄]²⁺.

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 correct IUPAC name for [Co(NH₃)₆]²⁺?

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

What is the concentration of Ni²⁺(aq)if 0.223 g of NiCl₂(s)is dissolved in 250.0 mL of 0.760 M NH₃(aq)? K_f ([Ni(NH₃)₆]²⁺)= 5.5 × 10⁸

Which of the following ions is highest in the spectrochemical series? NO₂^-,NH₃,Br^-,ox^2-,H₂O

It is known that the sulfhydryl group,^-SH,forms strong coordinate bonds to certain heavy metal ions.Which of the following do you expect to be the best chelating agent for heavy metal ions?

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

Why is an aqueous solution of Fe³⁺ acidic?

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