Week 23

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• Use the enthalpy change of solution of a simple ionic solid and relevant enthalpy change terms to construct Born–Haber cycles.

• Carry out related calculations.

Week 23

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Ionic lattice dissolves in polar solvents – each ion is surrounded by water molecules to become ‘hydrated’

Week 23

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Born–Haber cycle for calculating the enthalpy change of solution of KCl(s)

Week 23

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• Explain, in qualitative terms, the effect of ionic charge and ionic radius on lattice enthalpy and enthalpy change of hydration.

Week 23

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Trend in lattice enthalpies of the sodium halides

Week 23

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Lattice enthalpy becomes more exothermic as the ionic charge increases