Question 1

The iron in hemoglobin is ______ when carrying oxygen to cells,and _______ after releasing the oxygen.

Accepted Answer

A) diamagnetic Fe2+,paramagnetic Fe3+ 
B) diamagnetic Fe2+,paramagnetic Fe2+ 
C) paramagnetic Fe2+,diamagnetic Fe3+ 
D) paramagnetic Fe3+,diamagnetic Fe3+ 
E) none of these 
A) diamagnetic Fe2+,paramagnetic Fe3+ 
B) diamagnetic Fe2+,paramagnetic Fe2+ 
C) paramagnetic Fe2+,diamagnetic Fe3+ 
D) paramagnetic Fe3+,diamagnetic Fe3+ 
E) none of these

Question 2

The expected electron configuration of Cu+ is [Ar] 3s13d9.

Accepted Answer

A) True 
 B)False

Question 3

The complex ion Co(NH3)62+ (three unpaired electrons)is classified as:

Accepted Answer

A) weak field 
B) strong field 
C) no way to tell 
A) weak field 
B) strong field 
C) no way to tell

Question 4

Which 3d transition metal is mixed with concentrated sulfuric acid to give a powerful cleaning solution for removing organic materials from analytical glassware?

Accepted Answer

A) chromium 
B) iron 
C) cobalt 
D) scandium 
E) manganese 
A) chromium 
B) iron 
C) cobalt 
D) scandium 
E) manganese

Question 5

An element that is a significant component of both brass and bronze is:

Accepted Answer

A) nickel 
B) tin 
C) copper 
D) iron 
E) zinc 
A) nickel 
B) tin 
C) copper 
D) iron 
E) zinc

Question 6

Suppose you are studying coordination compounds of Co(II)with the ligand pyridine (py,CS1U1B15S1U1B0HS1U1B15S1U1B0N,molar mass = 79.10).You isolate a crystalline compound,and since the only available anions are ClS1U1P1-S1S1P0 and NOS1U1B13S1U1B0S1U1P1-S1S1P0,you hypothesize the empirical formula of the coordination compound must be CoS1U1B1wS1U1B0(py)S1U1B1xS1U1B0(Cl)S1U1B1yS1U1B0(NOS1U1B13S1U1B0)S1U1B1zS1U1B0.
-You analyze for pyridine (Kb is approximately 10-9)by dissolving 0.1000 g of complex in 10 mL of H2O and titrating with a 0.01 M HCl solution.Which of the following indicators should be used to detect the endpoint? (Assume that the initial concentration of pyridine is approximately 0.01 M. )

Accepted Answer

A) bromophenol blue,pH range of color change = 3.0-4.6 
B) methyl red,pH range of color change = 4.8-6.0 
C) bromothymol blue,pH range of color change = 6.0-7.6 
D) thymol blue,pH range of color change = 8.0 -9.6 
E) alizarin yellow,pH range of color change = 10.1-12.0 
A) bromophenol blue,pH range of color change = 3.0-4.6 
B) methyl red,pH range of color change = 4.8-6.0 
C) bromothymol blue,pH range of color change = 6.0-7.6 
D) thymol blue,pH range of color change = 8.0 -9.6 
E) alizarin yellow,pH range of color change = 10.1-12.0

Question 7

How many unpaired electrons are found in each of the following complex ions?
-CoBr4- (tetrahedral)

Accepted Answer

Question 8

Because they have the same atoms,bonds,and formulas,geometrical isomers have the same color.

Accepted Answer

A) True 
 B)False

Question 9

Analysis of the data from a titration indicates that a 0.1190-g sample of the complex contains 0.0844 g of py.Further analysis shows that 0.1190 g of the complex contains a 0.0157 g of cobalt and 0.0189 g of chloride.What is the empirical formula of the complex?

Accepted Answer

A) Co(py)6(Cl)(NO3) 
B) Co(py)4Cl2 
C) Co2(py)5(Cl)2(NO3)2 
D) Co3(py)8(Cl)2(NO3)4 
E) Co(py)4(NO3)2 
A) Co(py)6(Cl)(NO3) 
B) Co(py)4Cl2 
C) Co2(py)5(Cl)2(NO3)2 
D) Co3(py)8(Cl)2(NO3)4 
E) Co(py)4(NO3)2

Question 10

Carboxyhemoglobin is formed when __________ prevents the normal uptake of oxygen in the blood.

Accepted Answer

A) CN- 
B) CO 
C) CO2 
D) NH3 
E) CH4 
A) CN- 
B) CO 
C) CO2 
D) NH3 
E) CH4

Question 11

Which metal ion has a d5 electron configuration?

Accepted Answer

A) Cr2+ 
B) Ag+ 
C) Mn2+ 
D) Os2+ 
E) Co2+ 
A) Cr2+ 
B) Ag+ 
C) Mn2+ 
D) Os2+ 
E) Co2+

Question 12

Which complex ion shape is not capable of showing cis-trans isomerism?

Accepted Answer

A) octahedral 
B) square planar 
C) tetrahedral 
D) two of these 
E) none of these 
A) octahedral 
B) square planar 
C) tetrahedral 
D) two of these 
E) none of these

Question 13

A complex ion is a square planar complex.It has a d8 electron configuration.What is the most reasonable d orbital scheme for this complex?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 14

According to crystal field theory,how many unpaired electrons are present in the complex ion [Fe(H2O)6]2+? The water molecules are weak field ligands.

Accepted Answer

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

Question 15

What is the sum of all isomers (geometrical and optical)that the complex ion Co(en)2Cl2+ exhibits?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 16

How many unpaired electrons are found in each of the following complex ions?
-NiCl42-

Accepted Answer

Question 17

Here are some crystal field representations of d electrons in an octahedral complex:
I)   II)   III)   IV)   V)   Choose the representation that fits the transition metal atom in the following species:
-[Cr(NH3)5Cl]SO4

Accepted Answer

A) representation I 
B) representation II 
C) representation III 
D) representation IV 
E) representation V 
A) representation I 
B) representation II 
C) representation III 
D) representation IV 
E) representation V

Question 18

Which of the following transition metals is most likely to form an oxide?

Accepted Answer

A) gold 
B) silver 
C) platinum 
D) palladium 
E) copper 
A) gold 
B) silver 
C) platinum 
D) palladium 
E) copper

Question 19

This transition metal is used in the production of a hard steel used for rock crushers and bank vaults,and can be found in nodules on the ocean floor.

Accepted Answer

A) iron 
B) manganese 
C) magnesium 
D) cobalt 
E) nickel 
A) iron 
B) manganese 
C) magnesium 
D) cobalt 
E) nickel

Question 20

How many unpaired electrons are found in each of the following complex ions?
-[Zn(CN)6]4-

Accepted Answer

Exam 21: Transition Metals and Coordination Chemistry

The iron in hemoglobin is ______ when carrying oxygen to cells,and _______ after releasing the oxygen.

The expected electron configuration of Cu+ is [Ar] 3s13d9.

The complex ion Co(NH3)62+ (three unpaired electrons)is classified as:

Which 3d transition metal is mixed with concentrated sulfuric acid to give a powerful cleaning solution for removing organic materials from analytical glassware?

An element that is a significant component of both brass and bronze is:

How many unpaired electrons are found in each of the following complex ions? -CoBr4- (tetrahedral)

Because they have the same atoms,bonds,and formulas,geometrical isomers have the same color.

Analysis of the data from a titration indicates that a 0.1190-g sample of the complex contains 0.0844 g of py.Further analysis shows that 0.1190 g of the complex contains a 0.0157 g of cobalt and 0.0189 g of chloride.What is the empirical formula of the complex?

Carboxyhemoglobin is formed when __________ prevents the normal uptake of oxygen in the blood.

Which metal ion has a d5 electron configuration?

Which complex ion shape is not capable of showing cis-trans isomerism?

A complex ion is a square planar complex.It has a d8 electron configuration.What is the most reasonable d orbital scheme for this complex?

According to crystal field theory,how many unpaired electrons are present in the complex ion [Fe(H2O)6]2+? The water molecules are weak field ligands.

What is the sum of all isomers (geometrical and optical)that the complex ion Co(en)2Cl2+ exhibits?

How many unpaired electrons are found in each of the following complex ions? -NiCl42-

Here are some crystal field representations of d electrons in an octahedral complex: I) II) III) IV) V) Choose the representation that fits the transition metal atom in the following species: -[Cr(NH3)5Cl]SO4

Which of the following transition metals is most likely to form an oxide?

This transition metal is used in the production of a hard steel used for rock crushers and bank vaults,and can be found in nodules on the ocean floor.

How many unpaired electrons are found in each of the following complex ions? -[Zn(CN)6]4-

Chemical Foundations

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Gases

Thermochemistry

Atomic Structure and Periodicity

Bonding: General Concepts

Covalent Bonding: Orbitals

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Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex Ion Equilibria

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The Nucleus: a Chemists View

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Filters

The iron in hemoglobin is when carrying oxygen to cells,and _ after releasing the oxygen.

The expected electron configuration of Cu⁺ is [Ar] 3s¹3d⁹.

The complex ion Co(NH₃)₆²⁺ (three unpaired electrons)is classified as:

How many unpaired electrons are found in each of the following complex ions? -CoBr₄^- (tetrahedral)

Which metal ion has a d⁵ electron configuration?

A complex ion is a square planar complex.It has a d⁸ electron configuration.What is the most reasonable d orbital scheme for this complex?

According to crystal field theory,how many unpaired electrons are present in the complex ion [Fe(H₂O)₆]²⁺? The water molecules are weak field ligands.

What is the sum of all isomers (geometrical and optical)that the complex ion Co(en)₂Cl₂⁺ exhibits?

How many unpaired electrons are found in each of the following complex ions? -NiCl₄²^-

Here are some crystal field representations of d electrons in an octahedral complex: I) II) III) IV) V) Choose the representation that fits the transition metal atom in the following species: -[Cr(NH₃)₅Cl]SO₄

How many unpaired electrons are found in each of the following complex ions? -[Zn(CN)₆]⁴^-