The complex ions of Zn2+ are all colorless. The most likely explanation for this is that

A) Zn2+ exhibits "d orbital" splittings in its complexes such that they absorb all wavelengths in the visible region. B) because Zn2+ is a d10 ion, it does not absorb visible light even though the "d orbital" splittings are correct for absorbing visible wavelengths. C) Zn2+ is paramagnetic. D) Zn2+ is not a transition metal ion. E) None of these explanations could be correct. A) Zn2+ exhibits "d orbital" splittings in its complexes such that they absorb all wavelengths in the visible region. B) because Zn2+ is a d10 ion, it does not absorb visible light even though the "d orbital" splittings are correct for absorbing visible wavelengths. C) Zn2+ is paramagnetic. D) Zn2+ is not a transition metal ion. E) None of these explanations could be correct.

The 3d electrons in Co(NH3)63+ are all paired, but Fe(H2O)62+ has unpaired electrons (is paramagnetic). Explain.

Both complex ions have six 3d electrons.

How many unpaired electrons are found in Mn(NH3)43+ (tetrahedral)?

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

The complex ion Fe(CN)64- (no unpaired electrons) is classified as

A) There is no way to tell. B) strong field. C) weak field. A) There is no way to tell. B) strong field. C) weak field.

How many unpaired electrons are there in Ir(Br)64-? (Br- is a weak-field ligand.)

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

Give the number of geometric isomers for the octahedral compound [Ma2B2C2], where A, B, and C represent ligands.

A) 2 B) 1 C) 3 D) 5 E) none of these A) 2 B) 1 C) 3 D) 5 E) none of these

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 because the only available anions are ClS1U1P1-S1S1P0 and NOS1U1B13S1U1B0S1U1P1-S1S1P0, you hypothesize that 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 the complex in 100 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.)

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

How many unpaired electrons are found in MnCl42- (tetrahedral)?

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

Which of the following crystal field diagrams is correct for Co(CN)64-, where CN- is a strong-field ligand?

A) B) C) D) E) none of these A) B) C) D) E) none of these

How many unpaired electrons are found in Fe(en)32+ (strong field)?

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

Exam 19: Transition Metals and Coordination Chemistry

Choose the most likely pattern for the crystal field diagram for the complex trans-[Ni(NH₃)₂(CN)₄]²^-, where CN^- produces a much stronger crystal field than does NH₃.

(Multiple Choice)

4.8/5

(38)

Question 41

The complex ions of Zn²⁺ are all colorless. The most likely explanation for this is that

(Multiple Choice)

4.8/5

(43)

Question 42

Which of the following coordination compounds will form a precipitate when treated with an aqueous solution of AgNO₃?

(Multiple Choice)

4.8/5

(37)

Question 43

The 3d electrons in Co(NH₃)₆³⁺ are all paired, but Fe(H₂O)₆²⁺ has unpaired electrons (is paramagnetic). Explain.

(Essay)

4.8/5

(30)

Question 44

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -K₄Fe(CN)₆

(Multiple Choice)

4.8/5

(30)

Question 45

How many unpaired electrons are found in Mn(NH₃)₄³⁺(tetrahedral)?

(Multiple Choice)

4.8/5

(38)

Question 46

Which of the following are structural isomers? I.Coordination isomers II.Linkage isomers III.Geometric isomers IV.Optical isomers

(Multiple Choice)

4.8/5

(44)

Question 47

The complex ion Fe(CN)₆⁴^- (no unpaired electrons) is classified as

(Multiple Choice)

4.7/5

(30)

Question 48

Use the crystal field model to explain why solutions with Ag⁺ are colorless..

(Essay)

4.9/5

(39)

Question 49

How many unpaired electrons are there in Ir(Br)₆⁴^-? (Br^- is a weak-field ligand.)

(Multiple Choice)

4.8/5

(28)

Question 50

Give the number of geometric isomers for the octahedral compound [Ma₂B₂C₂], where A, B, and C represent ligands.

(Multiple Choice)

4.9/5

(34)

Question 51

Which of the following is paramagnetic?

(Multiple Choice)

4.9/5

(47)

Question 52

Suppose you are studying coordination compounds of Co(II) with the ligand pyridine (py, C₅H₅N, molar mass = 79.10). You isolate a crystalline compound, and because the only available anions are Cl^- and NO₃^-, you hypothesize that the empirical formula of the coordination compound must be Co_w(py)_x(Cl)_y(NO₃)_z. -You analyze for pyridine (K_b is approximately 10^-⁹) by dissolving 0.1000 g of the complex in 100 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.)

(Multiple Choice)

4.9/5

(35)

Question 53

Which of the following statements is true of the crystal field model?

(Multiple Choice)

4.9/5

(45)

Question 54

How many unpaired electrons are found in MnCl₄²^-(tetrahedral)?

(Multiple Choice)

4.7/5

(38)

Question 55

Which of the following crystal field diagrams is correct for Co(CN)₆⁴^-, where CN^- is a strong-field ligand?

(Multiple Choice)

4.8/5

(30)

Question 56

How many unpaired electrons are found in Fe(en)₃²⁺(strong field)?

(Multiple Choice)

4.7/5

(34)

Question 57

What is the electron configuration of the Co(II) ion?

(Multiple Choice)

4.9/5

(43)

Question 58

Which of the following transition metals is a component of vitamin B₁₂?

(Multiple Choice)

4.8/5

(41)

Question 59

In _________, the isomers contain the same atoms, but one or more bonds differ.

(Short Answer)

4.8/5

(45)

Question 60

Showing 41 - 60 of 91

Choose the most likely pattern for the crystal field diagram for the complex trans-[Ni(NH₃)₂(CN)₄]²^-, where CN^- produces a much stronger crystal field than does NH₃.

The complex ions of Zn²⁺ are all colorless. The most likely explanation for this is that

Which of the following coordination compounds will form a precipitate when treated with an aqueous solution of AgNO₃?

The 3d electrons in Co(NH₃)₆³⁺ are all paired, but Fe(H₂O)₆²⁺ has unpaired electrons (is paramagnetic). Explain.

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -K₄Fe(CN)₆

How many unpaired electrons are found in Mn(NH₃)₄³⁺(tetrahedral)?

Which of the following are structural isomers? I.Coordination isomers II.Linkage isomers III.Geometric isomers IV.Optical isomers

The complex ion Fe(CN)₆⁴^- (no unpaired electrons) is classified as

Use the crystal field model to explain why solutions with Ag⁺ are colorless..

How many unpaired electrons are there in Ir(Br)₆⁴^-? (Br^- is a weak-field ligand.)

Give the number of geometric isomers for the octahedral compound [Ma₂B₂C₂], where A, B, and C represent ligands.

Which of the following is paramagnetic?

Which of the following statements is true of the crystal field model?

How many unpaired electrons are found in MnCl₄²^-(tetrahedral)?

Which of the following crystal field diagrams is correct for Co(CN)₆⁴^-, where CN^- is a strong-field ligand?

How many unpaired electrons are found in Fe(en)₃²⁺(strong field)?

What is the electron configuration of the Co(II) ion?

Which of the following transition metals is a component of vitamin B₁₂?

In _________, the isomers contain the same atoms, but one or more bonds differ.

Atoms, Molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Quantum Mechanics and Atomic Theory

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

Exam 19: Transition Metals and Coordination Chemistry

Choose the most likely pattern for the crystal field diagram for the complex trans-[Ni(NH3)2(CN)4]2-, where CN- produces a much stronger crystal field than does NH3.

The complex ions of Zn2+ are all colorless. The most likely explanation for this is that

Which of the following coordination compounds will form a precipitate when treated with an aqueous solution of AgNO3?

The 3d electrons in Co(NH3)63+ are all paired, but Fe(H2O)62+ has unpaired electrons (is paramagnetic). Explain.

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -K4Fe(CN)6

How many unpaired electrons are found in Mn(NH3)43+ (tetrahedral)?

Which of the following are structural isomers? I.Coordination isomers II.Linkage isomers III.Geometric isomers IV.Optical isomers

The complex ion Fe(CN)64- (no unpaired electrons) is classified as

Use the crystal field model to explain why solutions with Ag+ are colorless..

How many unpaired electrons are there in Ir(Br)64-? (Br- is a weak-field ligand.)

Give the number of geometric isomers for the octahedral compound [Ma2B2C2], where A, B, and C represent ligands.

Which of the following is paramagnetic?

Which of the following statements is true of the crystal field model?

How many unpaired electrons are found in MnCl42- (tetrahedral)?

Which of the following crystal field diagrams is correct for Co(CN)64-, where CN- is a strong-field ligand?

How many unpaired electrons are found in Fe(en)32+ (strong field)?

What is the electron configuration of the Co(II) ion?

Which of the following transition metals is a component of vitamin B12?

In _________, the isomers contain the same atoms, but one or more bonds differ.

Atoms, Molecules, and Ions

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Quantum Mechanics and Atomic Theory

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

Choose the most likely pattern for the crystal field diagram for the complex trans-[Ni(NH₃)₂(CN)₄]²^-, where CN^- produces a much stronger crystal field than does NH₃.

The complex ions of Zn²⁺ are all colorless. The most likely explanation for this is that

Which of the following coordination compounds will form a precipitate when treated with an aqueous solution of AgNO₃?

The 3d electrons in Co(NH₃)₆³⁺ are all paired, but Fe(H₂O)₆²⁺ has unpaired electrons (is paramagnetic). Explain.

Here are some crystal field representations of d electrons in an octahedral field: Choose the representation that fits the transition metal atom in the following species. -K₄Fe(CN)₆

How many unpaired electrons are found in Mn(NH₃)₄³⁺(tetrahedral)?

The complex ion Fe(CN)₆⁴^- (no unpaired electrons) is classified as

Use the crystal field model to explain why solutions with Ag⁺ are colorless..

How many unpaired electrons are there in Ir(Br)₆⁴^-? (Br^- is a weak-field ligand.)

Give the number of geometric isomers for the octahedral compound [Ma₂B₂C₂], where A, B, and C represent ligands.

How many unpaired electrons are found in MnCl₄²^-(tetrahedral)?

Which of the following crystal field diagrams is correct for Co(CN)₆⁴^-, where CN^- is a strong-field ligand?

How many unpaired electrons are found in Fe(en)₃²⁺(strong field)?

Which of the following transition metals is a component of vitamin B₁₂?