Domanda del libro di testo
Which of the following trends in lattice energy is due to differences in ionic radii: a. NaCl > RbBr > CsBr, b. BaO > KF, c. SrO > SrCl2?
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Ch.8 - Basic Concepts of Chemical Bonding
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Capitolo 8, Problema 25d
The substances NaF and CaO are isoelectronic (have the same number of valence electrons). (d) Using the lattice energies in Table 8.1, predict the lattice energy of ScN.
Guida verificata passo dopo passo1
Identify the concept of lattice energy, which is the energy required to separate one mole of an ionic solid into its gaseous ions.
Understand that lattice energy is influenced by the charges of the ions and the distance between them, as described by Coulomb's Law.
Recognize that ScN is composed of Sc^{3+} and N^{3-} ions, which have higher charges compared to NaF and CaO, leading to a higher lattice energy.
Use the lattice energies of NaF and CaO from Table 8.1 as reference points, noting that higher charges in ScN will result in a significantly higher lattice energy.
Predict that the lattice energy of ScN will be greater than those of NaF and CaO due to the higher ionic charges, without calculating the exact value.
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Isoelectronic Species
Isoelectronic species are atoms, ions, or molecules that have the same number of electrons and, consequently, the same electronic structure. For example, NaF and CaO both have the same number of valence electrons, which influences their chemical properties and interactions. Understanding isoelectronic relationships helps predict the behavior of compounds in terms of stability and reactivity.
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Percorso guidato
03:03
Amphoteric Species
Lattice Energy
Lattice energy is the energy released when gaseous ions combine to form an ionic solid, or the energy required to separate one mole of a solid ionic compound into its gaseous ions. It is a measure of the strength of the forces between the ions in an ionic compound. Higher lattice energies indicate stronger ionic bonds, which can affect the stability and solubility of the compound.
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Percorso guidato
00:49Lattice Energy
Trends in Lattice Energy
Lattice energy trends can be predicted based on ionic charge and ionic size. Generally, greater charges on the ions lead to higher lattice energies due to stronger electrostatic attractions, while larger ionic radii result in lower lattice energies due to increased distance between the charged ions. Understanding these trends is essential for predicting the lattice energy of compounds like ScN based on known values from similar compounds.
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Percorso guidato
00:49Lattice Energy
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(a) Does the lattice energy of an ionic solid increase or decrease (i) as the charges of the ions increase, (ii) as the sizes of the ions increase?
807
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Domanda del libro di testo
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1074
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The substances NaF and CaO are isoelectronic (have the same number of valence electrons). (a) What are the charges on each of the cations in each compound?
806
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