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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Predict the trend in lattice energy, from least negative to most negative, for the following compounds based on the ion charges and ionic radii; LiI, LiF, CaO, RbI.

Interpretation Introduction

Interpretation:

The lattice energy from the least negative to most negative from the given compounds has to be predicted.

Concept introduction:

  • Ionic radius is the radius of an atom's ion in ionic crystals structure.
  • An ionic solid is made up cations and anions held together by electrostatic forces in a rigid array or lattice.
  • Positive charge ions are cations and negative charge ions are anions.
  • Lattice Energy is mainly depends on the charge on the ion and radius or size of the ion.
  • Ionic radius increases from top to bottom on the periodic table and decreases from left to right the periodic table.
Explanation

The lattice energy of the given compounds is shown below base on the ion charge and ionic radii.

  RbI<LiI<LiF<CaO

The lattice energy of the given compound is shown below,

Compound         Lattice Energy, kJ/mole

LiF                 -1045

LiI      �

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