Domanda del libro di testo
(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?
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Ch.8 - Basic Concepts of Chemical Bonding
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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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
Capitolo 8, Problema 23c
The substances NaF and CaO are isoelectronic (have the same number of valence electrons). (c) Without looking up lattice energies, which compound is predicted to have the larger lattice energy?
Guida verificata passo dopo passo1
Identify the ions present in each compound: NaF consists of Na⁺ and F⁻ ions, while CaO consists of Ca²⁺ and O²⁻ ions.
Understand that lattice energy is influenced by the charge of the ions and the distance between them. Higher charges and smaller distances result in larger lattice energies.
Compare the charges of the ions: Na⁺ and F⁻ both have charges of ±1, while Ca²⁺ and O²⁻ have charges of ±2.
Recognize that the greater the charge on the ions, the stronger the electrostatic attraction between them, leading to a larger lattice energy.
Conclude that CaO, with its ions having higher charges (Ca²⁺ and O²⁻), is predicted to have a larger lattice energy compared to NaF, which has ions with lower charges (Na⁺ and F⁻).
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Lattice Energy
Lattice energy is the energy released when gaseous ions combine to form an ionic solid. It is a measure of the strength of the forces between the ions in an ionic compound. Higher lattice energy indicates stronger ionic bonds, which typically results from smaller ions and higher charges. Understanding lattice energy is crucial for predicting the stability and properties of ionic compounds.
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Percorso guidato
00:49
Lattice Energy
Ionic Size and Charge
The size of the ions and their charges significantly influence lattice energy. Smaller ions can pack more closely together, leading to stronger electrostatic attractions and higher lattice energy. Additionally, ions with higher charges create stronger interactions due to the increased electrostatic force. In comparing NaF and CaO, the ionic sizes and charges of sodium, fluoride, calcium, and oxide must be considered.
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Percorso guidato
01:53Formal Charge
Isoelectronic Species
Isoelectronic species are atoms, ions, or molecules that have the same number of electrons. While they may have similar electronic configurations, their chemical properties can differ significantly due to differences in ionic size and charge. In the case of NaF and CaO, although they are isoelectronic, the differing charges and sizes of the ions will affect their lattice energies, making it essential to analyze these factors when predicting which compound has a larger lattice energy.
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Percorso guidato
03:03Amphoteric Species
Pratica correlata
Domanda del libro di testo
NaCl and KF have the same crystal structure. The only difference between the two is the distance that separates cations and anions. (b) Use the ionic radii given in Figure 7.8 to estimate the Na─Cl and K─F distances.
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Domanda del libro di testo
(b) Arrange the following substances not listed in Table 8.1 according to their expected lattice energies, listing them from lowest lattice energy to the highest: MgS, KI, GaN, LiBr.
Domanda del libro di testo
The substances NaF and CaO are isoelectronic (have the same number of valence electrons). (b) What are the charges of each of the anions in each compound?
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Domanda del libro di testo
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.
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Domanda del libro di testo
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?
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