Domanda del libro di testo
Give the electron-domain and molecular geometries for the following molecules and ions: (a) BeF2
621
views
Ch.9 - Molecular Geometry and Bonding Theories
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testo
Brown 14th EditionCh.9 - Molecular Geometry and Bonding TheoriesProblema 25b,c,d,e,f
Brown 14th EditionCh.9 - Molecular Geometry and Bonding TheoriesProblema 25b,c,d,e,fCapitolo 9, Problema 25b,c,d,e,f
Give the electron-domain and molecular geometries for the following molecules and ions: (b) AsCl5 (c) NO2- (d) CS2 (e) SF4 (f) BrF5
Guida verificata passo dopo passo1
Step 1: Draw the Lewis structure for the molecule or ion. For NO2-, the Lewis structure would have Nitrogen in the center, bonded to two Oxygen atoms. There is also an extra electron due to the negative charge, which is placed on the Nitrogen atom as a lone pair.
Step 2: Determine the electron-domain geometry. This is based on the number of electron domains - regions where electrons are most likely to be found. These include bonding pairs and lone pairs of electrons. For NO2-, there are three electron domains (two bonding and one lone pair), so the electron-domain geometry is trigonal planar.
Step 3: Determine the molecular geometry. This is based on the positions of the atoms, not the electron domains. For NO2-, the molecular geometry is bent or V-shaped, because the lone pair of electrons on the Nitrogen atom pushes the Oxygen atoms down, creating a bent shape.
Step 4: Remember that the presence of lone pairs can distort the shape of the molecule from the basic shape predicted by the number of bonding pairs alone. In this case, the lone pair on Nitrogen distorts the shape from a perfect trigonal planar to a bent shape.
Step 5: Finally, it's important to note that the actual bond angles in the molecule can be slightly less than the ideal angles predicted by the electron-domain geometry, due to the greater repulsion of lone pairs compared to bonding pairs.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
1mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Electron-Domain Geometry
Electron-domain geometry refers to the spatial arrangement of all electron domains (bonding and lone pairs) around a central atom in a molecule. It is determined by the number of electron domains, which can include single bonds, double bonds, triple bonds, and lone pairs. For example, a molecule with four electron domains adopts a tetrahedral geometry.
Video consigliato:
Percorso guidato
04:44
Electron Geometry
Molecular Geometry
Molecular geometry describes the three-dimensional arrangement of the atoms in a molecule, considering only the positions of the nuclei and not the lone pairs. It is influenced by the electron-domain geometry but differs when lone pairs are present, as they occupy space and can alter bond angles. For instance, in a molecule with a tetrahedral electron-domain geometry and one lone pair, the molecular geometry would be trigonal pyramidal.
Video consigliato:
Percorso guidato
01:33Molecular Geometry with Two Electron Groups
VSEPR Theory
Valence Shell Electron Pair Repulsion (VSEPR) theory is a model used to predict the geometry of molecules based on the repulsion between electron pairs around a central atom. According to VSEPR, electron pairs will arrange themselves to minimize repulsion, leading to specific molecular shapes. This theory helps in determining both electron-domain and molecular geometries by considering the number and type of electron domains.
Video consigliato:
Percorso guidato
02:13Molecular Shapes and VSEPR
Pratica correlata
Domanda del libro di testo
The figure that follows contains ball-and-stick drawings of three possible shapes of an AF4 molecule. (a) For each shape, give the electron-domain geometry on which the molecular geometry is based. ii.
364
views
Domanda del libro di testo
The figure that follows contains ball-and-stick drawings of three possible shapes of an AF4 molecule. (a) For each shape, give the electron-domain geometry on which the molecular geometry is based. iii.
479
views
Domanda del libro di testo
Draw the Lewis structure for each of the following molecules or ions, and predict their electron-domain and molecular geometries: (a) AsF3 (b) CH3+ (c) BrF3 (d) ClO3- (e) XeF2 (f) BrO2-
649
views