Question 1

What is the purpose of adding EDTA to prepared foods?

Accepted Answer

A) to keep ions such as Ca2+ in solution so the foods look good 
B) to complex trace metal ions that catalyze decomposition reactions 
C) to complex iron (III)ions so they can catalyze protein decomposition on cooking 
D) to aid in browning of the surface during cooking 
E) to prevent dissolution of the container in the food when stored for long periods of time 
A) to keep ions such as Ca2+ in solution so the foods look good 
B) to complex trace metal ions that catalyze decomposition reactions 
C) to complex iron (III)ions so they can catalyze protein decomposition on cooking 
D) to aid in browning of the surface during cooking 
E) to prevent dissolution of the container in the food when stored for long periods of time

Question 2

The coordination number and oxidation number of the central atom in [Fe(H2O)4Cl2] are ________ and ________,respectively.

Accepted Answer

A) 4, +1 
B) 6, +1 
C) 6, +2 
D) 5, +2 
E) 4, +2 
A) 4, +1 
B) 6, +1 
C) 6, +2 
D) 5, +2 
E) 4, +2

Question 3

In the leaves of plants,visible light is absorbed by a compound known as ________,and is aided by a ________ ion bonded to a porphyrin ring.

Accepted Answer

The answer of In the leaves of plants,visible light is...

Question 4

If chloride is a ligand to a transition metal,it will not be precipitated by silver nitrate.

Accepted Answer

A) True 
 B)False

Question 5

Draw a diagram of the short-hand ground state electron configuration of zinc.

Accepted Answer

The answer of Draw a diagram of the short-hand ground...

Question 6

The coordination sphere of a complex consists of ________.

Accepted Answer

A) the central metal ion only 
B) the ligands 
C) the central metal ion and the ligands bonded to it 
D) the primary and secondary valencies 
E) coordination and steric numbers 
A) the central metal ion only 
B) the ligands 
C) the central metal ion and the ligands bonded to it 
D) the primary and secondary valencies 
E) coordination and steric numbers

Question 7

Which of the following is a polydentate ligand?

Accepted Answer

A) ammonia 
B) oxalate ion 
C) chloride ion 
D) water 
E) hydroxide ion 
A) ammonia 
B) oxalate ion 
C) chloride ion 
D) water 
E) hydroxide ion

Question 8

Name the compound,[Os(en)3]2 [NiCl2Br2]3.

Accepted Answer

tris(ethylenediamine

Question 9

Which one of the following is the correct formula for pentaamminechlorocobalt (III)chloride?

Accepted Answer

A) [Co(NH3)5Cl]Cl2 
B) [Co(NH3)4Cl]Cl2 
C) [Co(NH3)6Cl]Cl2 
D) [Co(NH3)5]Cl4 
E) [Cl(NH3)5Co]Co2 
A) [Co(NH3)5Cl]Cl2 
B) [Co(NH3)4Cl]Cl2 
C) [Co(NH3)6Cl]Cl2 
D) [Co(NH3)5]Cl4 
E) [Cl(NH3)5Co]Co2

Question 10

In humans,what percent of absorbed iron is found in blood?

Accepted Answer

A) 15 
B) 25 
C) 40 
D) 60 
E) 75 
A) 15 
B) 25 
C) 40 
D) 60 
E) 75

Question 11

The transport of iron into bacteria is facilitated by the formation of the complex ________.

Accepted Answer

The answer of The transport of iron into bacteria is...

Question 12

What are the donor atoms in a porphine molecule?

Accepted Answer

A) N 
B) O 
C) S 
D) Br 
E) F 
A) N 
B) O 
C) S 
D) Br 
E) F

Question 13

What is the purpose of adding sodium tripolyphosphate to a detergent?

Accepted Answer

to sequester the metal ions in

Question 14

Define the chelate effect.

Accepted Answer

Chelate effect = an increased

Question 15

The charge of the complex ion in [Zn(H2O)3Cl]Cl ________.

Accepted Answer

A) 0 
B) 1- 
C) 2+ 
D) 1+ 
E) 2- 
A) 0 
B) 1- 
C) 2+ 
D) 1+ 
E) 2-

Question 16

What is the charge of the central metal ion in Ca3[Fe(CN)6]2?

Accepted Answer

A) 0 
B) 1+ 
C) 2+ 
D) 3+ 
E) 6+ 
A) 0 
B) 1+ 
C) 2+ 
D) 3+ 
E) 6+

Question 17

Which of the following is a polydentate ligand?

Accepted Answer

A) ethylenediamine 
B) water 
C) cyanide ion 
D) nitrite ion 
E) ammonia 
A) ethylenediamine 
B) water 
C) cyanide ion 
D) nitrite ion 
E) ammonia

Question 18

Which compound is most likely white/colorless?

Accepted Answer

A) [Cu(H2O)4]2+ 
B) [Ni(H2O)6]2+ 
C) [Cr(H2O)5Cl]2+ 
D) [Cd(H2O)4]2+ 
E) [Co(H2O)6]2+ 
A) [Cu(H2O)4]2+ 
B) [Ni(H2O)6]2+ 
C) [Cr(H2O)5Cl]2+ 
D) [Cd(H2O)4]2+ 
E) [Co(H2O)6]2+

Question 19

How many bonds can ethylenediamine form to a metal ion?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 6 
A) 1 
B) 2 
C) 3 
D) 4 
E) 6

Question 20

Based on the crystal-field strengths F- 2CN 3 2- -,which Co (III)complex is most likely high-spin?

Accepted Answer

A) [Co(NH3)6]3+ 
B) [Co(NO2)6]3- 
C) [Co(CN)6]3- 
D) [CoF6]3- 
E) [Co(CH3CN)6]3+ 
A) [Co(NH3)6]3+ 
B) [Co(NO2)6]3- 
C) [Co(CN)6]3- 
D) [CoF6]3- 
E) [Co(CH3CN)6]3+

Exam 23: Transition Metals and Coordination Chemistry

What is the purpose of adding EDTA to prepared foods?

The coordination number and oxidation number of the central atom in [Fe(H2O)4Cl2] are ________ and ________,respectively.

In the leaves of plants,visible light is absorbed by a compound known as ________,and is aided by a ________ ion bonded to a porphyrin ring.

If chloride is a ligand to a transition metal,it will not be precipitated by silver nitrate.

Draw a diagram of the short-hand ground state electron configuration of zinc.

The coordination sphere of a complex consists of ________.

Which of the following is a polydentate ligand?

Name the compound,[Os(en)3]2 [NiCl2Br2]3.

Which one of the following is the correct formula for pentaamminechlorocobalt (III)chloride?

In humans,what percent of absorbed iron is found in blood?

The transport of iron into bacteria is facilitated by the formation of the complex ________.

What are the donor atoms in a porphine molecule?

What is the purpose of adding sodium tripolyphosphate to a detergent?

Define the chelate effect.

The charge of the complex ion in [Zn(H2O)3Cl]Cl ________.

What is the charge of the central metal ion in Ca3[Fe(CN)6]2?

Which of the following is a polydentate ligand?

Which compound is most likely white/colorless?

How many bonds can ethylenediamine form to a metal ion?

Based on the crystal-field strengths F- < CH2CN < NH3 < NO2- < CN-,which Co (III)complex is most likely high-spin?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

The Chemistry of Life: Organic and Biological Chemistry

Filters

The coordination number and oxidation number of the central atom in [Fe(H₂O)₄Cl₂] are and ,respectively.

In the leaves of plants,visible light is absorbed by a compound known as ,and is aided by a ion bonded to a porphyrin ring.

Name the compound,[Os(en)₃]₂ [NiCl₂Br₂]₃.

The charge of the complex ion in [Zn(H₂O)₃Cl]Cl ________.

What is the charge of the central metal ion in Ca₃[Fe(CN)₆]₂?

Based on the crystal-field strengths F^- < CH₂CN < NH₃< NO₂^- < CN^-,which Co (III)complex is most likely high-spin?