Addition of AgNO3 to aqueous solutions of the complex results in a cloudy white precipitate, presumably AgCl. You dissolve 0.1000 g of the complex in H2O and perform a precipitation titration with 0.0500 M AgNO3 as the titrant. Using an electrode that is sensitive to [Ag+], you reach the endpoint after 9.00 mL of titrant is added. How many grams of chloride ion were present in the 0.1000-g sample?

A) 4.50 × 10-4 g B) 1.77 × 10-3 g C) 5.00 × 10-3 g D) 1.60 × 10-2 g E) 6.38 × 10-2 g A) 4.50 × 10-4 g B) 1.77 × 10-3 g C) 5.00 × 10-3 g D) 1.60 × 10-2 g E) 6.38 × 10-2 g

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 [CoCl6]3- (weak field)?

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

The complex ion Co(NH3)62+ (three 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.

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

Specify the number of unpaired electrons in Co(en) 33+ (strong field).

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

Exam 19: Transition Metals and Coordination Chemistry

Analysis of the data from a titration indicates that a 0.1000-g sample of the complex contains 0.0708 g of py. Further analysis shows that 0.1000 g of the complex contains 0.0132 g of cobalt and 0.0160 g of chloride. What is the empirical formula of the complex?

(Multiple Choice)

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Question 81

Addition of AgNO₃ to aqueous solutions of the complex results in a cloudy white precipitate, presumably AgCl. You dissolve 0.1000 g of the complex in H₂O and perform a precipitation titration with 0.0500 M AgNO₃ as the titrant. Using an electrode that is sensitive to [Ag⁺], you reach the endpoint after 9.00 mL of titrant is added. How many grams of chloride ion were present in the 0.1000-g sample?

(Multiple Choice)

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Question 82

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

(Multiple Choice)

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Question 83

For which of the following metal ions would there be no distinction between low spin and high spin in octahedral complexes?

(Multiple Choice)

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Question 84

Explain the toxicities of carbon monoxide (CO) and the cyanide ion (CN^-).

(Short Answer)

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Question 85

Consider the pseudo-octahedral complex of Cr³⁺ shown below, where A and B represent Lewis bases and where A produces a stronger crystal field than B. Draw an appropriate crystal field diagram for this complex (include the electrons).

(Short Answer)

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Question 86

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

(Essay)

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Question 87

How many unpaired electrons are found in [CoCl₆]^3- (weak field)?

(Multiple Choice)

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Question 88

Which transition metal can exist in all oxidation states from +2 to +7?

(Multiple Choice)

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Question 89

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

(Multiple Choice)

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Question 90

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

(Multiple Choice)

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Question 91

Oxygen is stored in mammalian tissue in which type of molecule?

(Multiple Choice)

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Question 92

In which of the following complexes does the transition metal have a d⁸ configuration?

(Multiple Choice)

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Question 93

The empirical formula of a compound with a mass percent composition of 6.78% H, 31.43% N, 39.76% Cl, and 22.03% Co is consistent with which of the following complexes?

(Multiple Choice)

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Question 94

Fluoride ion ranks low in the spectrochemical series and produces a weak crystal field in complex ions. Based on this information, predict the number of unpaired electrons in [CoF₆]^3-.

(Multiple Choice)

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Question 95

Specify the number of unpaired electrons in Co(en) ₃³⁺ (strong field).

(Multiple Choice)

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Question 96

Showing 81 - 96 of 96

Analysis of the data from a titration indicates that a 0.1000-g sample of the complex contains 0.0708 g of py. Further analysis shows that 0.1000 g of the complex contains 0.0132 g of cobalt and 0.0160 g of chloride. What is the empirical formula of the complex?

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

For which of the following metal ions would there be no distinction between low spin and high spin in octahedral complexes?

Explain the toxicities of carbon monoxide (CO) and the cyanide ion (CN^-).

Consider the pseudo-octahedral complex of Cr³⁺ shown below, where A and B represent Lewis bases and where A produces a stronger crystal field than B. Draw an appropriate crystal field diagram for this complex (include the electrons).

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

How many unpaired electrons are found in [CoCl₆]^3- (weak field)?

Which transition metal can exist in all oxidation states from +2 to +7?

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

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

Oxygen is stored in mammalian tissue in which type of molecule?

In which of the following complexes does the transition metal have a d⁸ configuration?

The empirical formula of a compound with a mass percent composition of 6.78% H, 31.43% N, 39.76% Cl, and 22.03% Co is consistent with which of the following complexes?

Fluoride ion ranks low in the spectrochemical series and produces a weak crystal field in complex ions. Based on this information, predict the number of unpaired electrons in [CoF₆]^3-.

Specify the number of unpaired electrons in Co(en) ₃³⁺ (strong field).

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Exam 19: Transition Metals and Coordination Chemistry

Analysis of the data from a titration indicates that a 0.1000-g sample of the complex contains 0.0708 g of py. Further analysis shows that 0.1000 g of the complex contains 0.0132 g of cobalt and 0.0160 g of chloride. What is the empirical formula of the complex?

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

For which of the following metal ions would there be no distinction between low spin and high spin in octahedral complexes?

Explain the toxicities of carbon monoxide (CO) and the cyanide ion (CN-).

Consider the pseudo-octahedral complex of Cr3+ shown below, where A and B represent Lewis bases and where A produces a stronger crystal field than B. Draw an appropriate crystal field diagram for this complex (include the electrons).

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

How many unpaired electrons are found in [CoCl6]3- (weak field)?

Which transition metal can exist in all oxidation states from +2 to +7?

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

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

Oxygen is stored in mammalian tissue in which type of molecule?

In which of the following complexes does the transition metal have a d8 configuration?

The empirical formula of a compound with a mass percent composition of 6.78% H, 31.43% N, 39.76% Cl, and 22.03% Co is consistent with which of the following complexes?

Fluoride ion ranks low in the spectrochemical series and produces a weak crystal field in complex ions. Based on this information, predict the number of unpaired electrons in [CoF6]3-.

Specify the number of unpaired electrons in Co(en) 33+ (strong field).

Atoms, Molecules, and Ions

Stoichiometry

Types of Chemical Reactions and Solution 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

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

Explain the toxicities of carbon monoxide (CO) and the cyanide ion (CN^-).

Consider the pseudo-octahedral complex of Cr³⁺ shown below, where A and B represent Lewis bases and where A produces a stronger crystal field than B. Draw an appropriate crystal field diagram for this complex (include the electrons).

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

How many unpaired electrons are found in [CoCl₆]^3- (weak field)?

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

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

In which of the following complexes does the transition metal have a d⁸ configuration?

Fluoride ion ranks low in the spectrochemical series and produces a weak crystal field in complex ions. Based on this information, predict the number of unpaired electrons in [CoF₆]^3-.

Specify the number of unpaired electrons in Co(en) ₃³⁺ (strong field).