Domanda del libro di testo
The oxalate ion is a bidentate ligand as indicated in Figure 21.8. Would you expect the carbonate ion to be a monodentate or bidentate ligand? Explain your reasoning.
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Ch.21 - Transition Elements and Coordination Chemistry
McMurry8th EditionChemistryISBN: 9781292336145
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TOC.tableOfContents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
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McMurry 8th EditionCh.21 - Transition Elements and Coordination ChemistryProblema 21.1
McMurry 8th EditionCh.21 - Transition Elements and Coordination ChemistryProblema 21.1Capitolo 21, Problema 21.1
What is the electron configuration of Co2+ and how many unpaired electrons are in the free transition metal ion?
(a) [Ar]3d54s2; 5 unpaired electrons
(b) [Ar]3d54s2; 1 unpaired electron
(c) [Ar]3d7; 3 unpaired electrons
(d) [Ar]3d7; 1 unpaired electron
Guida verificata passo dopo passo1
Determine the electron configuration of a neutral cobalt (Co) atom. Cobalt has an atomic number of 27, so its electron configuration is [Ar]3d^7 4s^2.
Identify the change in electron configuration when cobalt forms a Co^{2+} ion. This involves removing two electrons from the neutral atom.
Remove electrons starting from the outermost shell, which is the 4s orbital in this case. So, remove the two electrons from the 4s orbital.
Write the electron configuration for Co^{2+} after removing the electrons: [Ar]3d^7.
Determine the number of unpaired electrons in the 3d^7 configuration. In a 3d^7 configuration, there are 3 unpaired electrons.
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Concetti chiave
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Electron Configuration
Electron configuration describes the distribution of electrons in an atom's orbitals. For transition metals, this involves filling the 3d and 4s orbitals. The notation uses the noble gas core, followed by the specific orbitals and the number of electrons in each, which is crucial for determining the chemical properties and reactivity of the element.
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Percorso guidato
01:33
Electron Configuration Example
Transition Metals and Oxidation States
Transition metals can exhibit multiple oxidation states due to the involvement of d electrons in bonding. For cobalt (Co), the +2 oxidation state (Co<sup>2+</sup>) results from the loss of two electrons, typically from the 4s orbital first, followed by the 3d orbital. Understanding oxidation states is essential for predicting the electron configuration of ions.
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Percorso guidato
03:12Transition Metals
Unpaired Electrons and Magnetism
Unpaired electrons in an atom or ion contribute to its magnetic properties. The presence of unpaired electrons can lead to paramagnetism, where the substance is attracted to magnetic fields. Counting unpaired electrons is vital for understanding the behavior of transition metal ions in various chemical contexts, including their reactivity and bonding.
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00:59Magnetic Quantum Example
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What is the oxidation state of the metal in each of the complexes?
a. AgCl2–
b. [Cr(H2O)5Cl]2+
c. [Co(NCS)4]2–
d. [ZrF8]4–
e. [Fe(EDTA)(H2O)]–
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What role does EDTA4- play as a trace additive to mayonnaise? Would the glycinate ion (H2NCH2CH2NH2) be an effective substitute for EDTA4-?
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Domanda del libro di testo
Which of the following complexes are diamagnetic?
(a) [Ni(H2O)6]2+
(b) [Co(CN)6]3-
(c) [HgI4]2- (tetrahedral)
(d) [Cu(NH3)4]2+ (square planar)
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Domanda del libro di testo
For each of the following complexes, draw a crystal field energy-level diagram, assign the electrons to orbitals, and predict the number of unpaired electrons.
(d) [Cu(en)2]2+ (square planar)
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