Chapter 23 – Transition Metals Chemistry and Coordination Compounds
67.
Copper can be separated from iron in the ore chalcopyrite (CuFeS2) by heating the ore in the presence of oxygen to form
copper(I) sulfide, iron(II) oxide, and one other product. Complete the following partially balanced equation by deciding both
the identity of the missing compound and the number of moles required to balance the equation. (Note, no other coefficients
are allowed to be changed.)
2CuFeS2(s) + 4O2(g) → Cu2S(s) + 2FeO(s) + _____
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
68. What is the coordination number of silver in [Ag(NH3)2]Cl?
69. What is the coordination number of chromium in Cr(en)2Cl2?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
70. Select True or False: A molecule or ion that provides an electron pair for coordinate
covalent bond formation is called a Lewis acid.
71. Select True or False: A molecule or atom that accepts an electron pair to form a
coordinate covalent bond is called a Lewis base.
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
72. What is the coordination number of cobalt in [Co(NH3)6]Cl3?
73. What is the oxidation number of cobalt in [Co(NH3)6]Cl3?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
74. Select True or False: The terms that describe the geometric isomers that are possible for
the complex [CrF2Cl4]3– are cis and trans.
75.
Select True or False: The correct labels for the geometric isomers of [CrF2Cl4]3– shown here are (from left to right) trans and
cis.
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
76. How many geometric isomers are possible for the complex [CrF3Br3]3–?
77. Select True or False: The chemical formula of triammineaquodichlorochromium(III)
chloride is:
[Cr(NH3)3(H2O)Cl2]Cl
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
78.
Select True or False: The chemical formula of the dibromobis(oxalato)cobaltate(III) ion is:
[CoBr2(C2O4)2]3–
79. Select True or False: The chemical formula of diamminedichloroplatinum(II) is:
80. Select True or False: The correct name of the complex ion [Ni(CN)4]2– is:
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
81. Select True or False: The correct name of the complex ion [CuCl3Br(NH3)2]2– is:
diamminebromotrichlorocuprate(I) ion
82. Select True or False: The correct name of the complex ion [Co(H2O)4Cl2]+ is:
tetraaquodichlorocobalt(III) ion
83. Select True or False: The correct name of the complex ion [Cr(en)2(H2O)2]2+ is:
diaquobis(ethylenediamine)chromium(IV) ion
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
84. Predict the number of unpaired electrons in the [Cr(en)3]2+ ion.
85. Predict the number of unpaired electrons in the [CrCl6]4– ion.
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
86. Predict the number of unpaired electrons in the [Fe(CN)6]4– ion.
87. Predict the number of unpaired electrons in the [Fe(CN)6]3– ion.
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
88.
Determine (i) the oxidation number of the metal, (ii) the number of d electrons, (iii) the coordination number, (iv) the charge
of the complex ion, and (v) the number and type of ligands for the coordination compound shown below.
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
89. Select True or False: The neutral monodentate ligand L forms the complex ion [CrL6]2+,
and the magnetic properties of this complex correspond to 2 unpaired electrons. This indicates
that L is a strong-field ligand.
90. Select True or False: The oxidation number of Co in [Co(NH3)4Cl2]Cl is +1.
91. Select True or False: Bidentate and polydentate ligands are also called chelating agents.
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
92. Select True or False: In transition metal complexes, the metal ions are Lewis acids.