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Ionic Bonding (Section)(a) Does the lattice energy of an

Chemistry: The Central Science | 12th Edition | ISBN: 9780321696724 | Authors: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward ISBN: 9780321696724 27

Solution for problem 24E Chapter 8

Chemistry: The Central Science | 12th Edition

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Chemistry: The Central Science | 12th Edition | ISBN: 9780321696724 | Authors: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward

Chemistry: The Central Science | 12th Edition

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Problem 24E

Problem 24E

Ionic Bonding (Section)

(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?

(b) Arrange the following substances not listed in Table according to their expected lattice energies, listing them from lowest lattice energy to the highest: MgS, KI, GaN, LiBr.

Table Lattice Energies for Some Ionic Compounds

Compound

Lattice Energy (kJ/mol)

Compound

Lattice Energy (kJ/mol)

LiF

1030

MgCl2

2326

LiCl

834

SrCl2

2127

LiI

730

 

 

NaF

910

MgO

3795

NaCl

788

CaO

3414

NaBr

732

SrO

3217

NaI

682

 

 

KF

808

ScN

7547

KCl

701

 

 

KBr

671

 

 

CsCl

657

 

 

CsI

600

 

 

Step-by-Step Solution:

Problem 24EIonic Bonding (Section)(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(b) Arrange the following substances not listed in Table according to their expected latticeenergies, listing them from lowest lattice energy to the highest: MgS, KI, GaN, LiBr.Table Lattice Energies for Some Ionic Compounds Lattice Energy Lattice Energy Compound Compound (kJ/mol) (kJ/mol) LiF 1030 MgCl2 2326 LiCl 834 SrCl2 2127 LiI 730 NaF 910 MgO 3795 NaCl 788 CaO 3414 NaBr 732 SrO 3217 NaI 682 KF 808 ScN 7547 KCl 701 KBr 671 CsCl 657 CsI 600\nSolution 24E: (a) Here, we are going to explain the factors that are affecting the Lattice energy.Step 1:Lattice energy: It is the energy required to completely separate one mole of a solid ioniccompound into its gaseous ions. + NaCl(s) Na (aq) + Cl (aq) H lattice + 788 kJ/molThe magnitude of the lattice energy of an ionic solid depends on the charges of theions, their sizes, and their arrangement in the solid. k Q QE = d 2Where,Q1 and Q2 are the charges on the particles in Coulombs, with their signs; d is the distancebetween their centers in meters, and k is a constant.

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Chapter 8, Problem 24E is Solved
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Textbook: Chemistry: The Central Science
Edition: 12
Author: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward
ISBN: 9780321696724

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Ionic Bonding (Section)(a) Does the lattice energy of an