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Get Full Access to Chemistry: The Central Science - 12 Edition - Chapter 8 - Problem 24e
Get Full Access to Chemistry: The Central Science - 12 Edition - Chapter 8 - Problem 24e

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

ISBN: 9780321696724 27

## Solution for problem 24E Chapter 8

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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