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Chapter 3

Chapter 3 - Ionic Compounds.pdf

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Department
Chemistry
Course
CHEM 121
Professor
Mark Mac Lachlan
Semester
Winter

Description
Chapter 3Ionic Compounds Representative Chemistry of the sBlock Elements Ionic Compounds Lattice Energy LELattice Energy energy required to convert 1 mole of a crystalline solid into its constituent ions in the gas phase and at infinite separation measured in kJmolfor an ion pair the energy of electrostatic attraction between M and A is given by where separation between the nuclei of the ionsalkali metals and alkaline earth metals lose their valence electrons to form cations in ionic 2compounds always M for alkali metals and M for alkaline earth metals Discussion Questions a Rationalize the relative lattice energies of LiF 1030 kJmol LiCl 834 kJmol and LiBr 788 kJmolatomic radius increases from F to Cl to Br so the separation between nuclei becomes larger b Rationalize the relative lattices energies of LiF NaF 910 k
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