Question 1

Determine the number of unpaired electrons in the low-spin complex ion Cr(CN)64−.

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  4 
E)  5 
A)  0 
B)  1 
C)  2 
D)  4 
E)  5

Question 2

What is the name of the compound having the formula (NH4)2[Cu(CN)4]?

Accepted Answer

A)  ammonium tetracyanocuprate(II) 
B)  diammonium tetracyanocuprate(II) 
C)  bisamminetetracyanocuprate(II) 
D)  tetracyanobisamminecuprate(II) 
E)  tetracyanocuprate(II)ammonia 
A)  ammonium tetracyanocuprate(II) 
B)  diammonium tetracyanocuprate(II) 
C)  bisamminetetracyanocuprate(II) 
D)  tetracyanobisamminecuprate(II) 
E)  tetracyanocuprate(II)ammonia

Question 3

Which of the following molecules or ions are chelating agents: NH3,H2NCH2CH2NH2,CO2,and C2O42−?

Accepted Answer

A)  NH3 
B)  NH3 and CO2 
C)  CO2 and H2NCH2CH2NH2 
D)  H2NCH2CH2NH2 and C2O42− 
E)  CO2,H2NCH2CH2NH2 and C2O42− 
A)  NH3 
B)  NH3 and CO2 
C)  CO2 and H2NCH2CH2NH2 
D)  H2NCH2CH2NH2 and C2O42− 
E)  CO2,H2NCH2CH2NH2 and C2O42−

Question 4

Potassium hexacyanoiron(II),K4[Fe(CN)6],is water soluble.In an aqueous solution,it will decompose into

Accepted Answer

A)  2 ions. 
B)  4 ions. 
C)  5 ions. 
D)  6 ions. 
E)  10 ions. 
A)  2 ions. 
B)  4 ions. 
C)  5 ions. 
D)  6 ions. 
E)  10 ions.

Question 5

Determine the number of unpaired electrons in an octahedral,high-spin Cr(II)complex.

Accepted Answer

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

Question 6

The crystal field splitting energy for TiF63− is 203 kJ/mol.At what wavelength does the maximum absorbance of light occur for this complex?

Accepted Answer

A)  9.80 × 10−31 nm 
B)  9.80 × 10−28 nm 
C)  4.32 × 102 nm 
D)  5.90 × 102 nm 
E)  1.02 × 103 nm 
A)  9.80 × 10−31 nm 
B)  9.80 × 10−28 nm 
C)  4.32 × 102 nm 
D)  5.90 × 102 nm 
E)  1.02 × 103 nm

Question 7

Chlorophylls are coordination compounds that contain a magnesium ion as the central metal.The most abundant chlorophyll,called chlorophyll a,has a mass percent of magnesium of 2.72%.What is the molar mass of chlorophyll a?

Accepted Answer

A)  2.72 g/mol 
B)  57.2 g/mol 
C)  112 g/mol 
D)  583 g/mol 
E)  893 g/mol 
A)  2.72 g/mol 
B)  57.2 g/mol 
C)  112 g/mol 
D)  583 g/mol 
E)  893 g/mol

Question 8

What is the name of the compound having the formula K2[PtCl4]?

Accepted Answer

A)  potassium chloroplatinate(II) 
B)  potassium tetrachloroplatinate(II) 
C)  potassium chloroplatinate(IV) 
D)  potassium platanotetrachlorate(II) 
E)  dipotassium tetrachloroplatnum(II) 
A)  potassium chloroplatinate(II) 
B)  potassium tetrachloroplatinate(II) 
C)  potassium chloroplatinate(IV) 
D)  potassium platanotetrachlorate(II) 
E)  dipotassium tetrachloroplatnum(II)

Question 9

Alfred Werner published his theory of coordination chemistry in 1893.One of the postulates of his theory was that coordination complexes have "primary valences" and "secondary valences." He showed this by testing the ____ of solutions containing [Co(NH3)6]Cl3 vs.[Co(NH3)5 Cl]Cl2 vs.[Co(NH3)4 Cl2]Cl.

Accepted Answer

A)  color 
B)  conductivity 
C)  density 
D)  melting point 
E)  taste 
A)  color 
B)  conductivity 
C)  density 
D)  melting point 
E)  taste

Question 10

The wavelength of maximum absorption of Cu(NH3)42+ is 5.80 × 102 nm.What is the energy of the electronic transition?

Accepted Answer

A)  3.80 × 10−36 J 
B)  1.16 × 10−31 J 
C)  1.16 × 10−22 J 
D)  3.42 × 10−19 J 
E)  2.63 × 10+35 J 
A)  3.80 × 10−36 J 
B)  1.16 × 10−31 J 
C)  1.16 × 10−22 J 
D)  3.42 × 10−19 J 
E)  2.63 × 10+35 J

Question 11

All of the following ions are able to form both low-spin and high-spin octahedral complex ions EXCEPT

Accepted Answer

A)  Cr2+. 
B)  Cr3+. 
C)  Mn2+. 
D)  Fe3+. 
E)  Co3+. 
A)  Cr2+. 
B)  Cr3+. 
C)  Mn2+. 
D)  Fe3+. 
E)  Co3+.

Determine the number of unpaired electrons in the low-spin complex ion Cr(CN)₆⁴⁻.

What is the name of the compound having the formula (NH₄)₂[Cu(CN)₄]?

Which of the following molecules or ions are chelating agents: NH₃,H₂NCH₂CH₂NH₂,CO₂,and C₂O₄²⁻?

Potassium hexacyanoiron(II),K₄[Fe(CN)₆],is water soluble.In an aqueous solution,it will decompose into

Determine the number of unpaired electrons in an octahedral,high-spin Cr(II)complex.

The crystal field splitting energy for TiF₆³⁻ is 203 kJ/mol.At what wavelength does the maximum absorbance of light occur for this complex?

Chlorophylls are coordination compounds that contain a magnesium ion as the central metal.The most abundant chlorophyll,called chlorophyll a,has a mass percent of magnesium of 2.72%.What is the molar mass of chlorophyll a?

What is the name of the compound having the formula K₂[PtCl₄]?

The wavelength of maximum absorption of Cu(NH₃)₄²⁺ is 5.80 × 10² nm.What is the energy of the electronic transition?

All of the following ions are able to form both low-spin and high-spin octahedral complex ions EXCEPT

Matter and Measurements

Atoms, molecules, and Ions

Mass Relations in Chemistry;stoichiometry

Reactions in Aqueous Solution

Gases

Electronic Structure and the Periodic Table

Covalent Bonding

Thermochemistry

Liquids and Solids

Solutions

Rate of Reaction

Gaseous Chemical Equilibrium

Acids and Bases

Equilibria in Acid-Base Solutions

Complex Ion and Precipitation Equilibria

Spontaneity of Reaction

Electrochemistry

Nuclear Reactions

Chemistry of the Metals

Chemistry of the Nonmetals

Organic Chemistry

Organic Polymers, natural and Synthetic

Filters

Exam 19: Complex Ions

Determine the number of unpaired electrons in the low-spin complex ion Cr(CN)64−.

What is the name of the compound having the formula (NH4)2[Cu(CN)4]?

Which of the following molecules or ions are chelating agents: NH3,H2NCH2CH2NH2,CO2,and C2O42−?

Potassium hexacyanoiron(II),K4[Fe(CN)6],is water soluble.In an aqueous solution,it will decompose into

Determine the number of unpaired electrons in an octahedral,high-spin Cr(II)complex.

The crystal field splitting energy for TiF63− is 203 kJ/mol.At what wavelength does the maximum absorbance of light occur for this complex?

Chlorophylls are coordination compounds that contain a magnesium ion as the central metal.The most abundant chlorophyll,called chlorophyll a,has a mass percent of magnesium of 2.72%.What is the molar mass of chlorophyll a?

What is the name of the compound having the formula K2[PtCl4]?

The wavelength of maximum absorption of Cu(NH3)42+ is 5.80 × 102 nm.What is the energy of the electronic transition?

All of the following ions are able to form both low-spin and high-spin octahedral complex ions EXCEPT

Matter and Measurements

Atoms, molecules, and Ions

Mass Relations in Chemistry;stoichiometry

Reactions in Aqueous Solution

Gases

Electronic Structure and the Periodic Table

Covalent Bonding

Thermochemistry

Liquids and Solids

Solutions

Rate of Reaction

Gaseous Chemical Equilibrium

Acids and Bases

Equilibria in Acid-Base Solutions

Complex Ion and Precipitation Equilibria

Spontaneity of Reaction

Electrochemistry

Nuclear Reactions

Chemistry of the Metals

Chemistry of the Nonmetals

Organic Chemistry

Organic Polymers, natural and Synthetic

Filters

Determine the number of unpaired electrons in the low-spin complex ion Cr(CN)₆⁴⁻.

What is the name of the compound having the formula (NH₄)₂[Cu(CN)₄]?

Which of the following molecules or ions are chelating agents: NH₃,H₂NCH₂CH₂NH₂,CO₂,and C₂O₄²⁻?

Potassium hexacyanoiron(II),K₄[Fe(CN)₆],is water soluble.In an aqueous solution,it will decompose into

The crystal field splitting energy for TiF₆³⁻ is 203 kJ/mol.At what wavelength does the maximum absorbance of light occur for this complex?

What is the name of the compound having the formula K₂[PtCl₄]?

The wavelength of maximum absorption of Cu(NH₃)₄²⁺ is 5.80 × 10² nm.What is the energy of the electronic transition?