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Learning objective

Explain the physical properties of ionic compounds using lattice structure.

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Topic

Bonding

Subtopic

Ionic bonding

Aqa A Level ChemistryPhysical chemistry

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Quick explanation

Explain the physical properties of ionic compounds using lattice structure

  • This point belongs to Bonding, especially Ionic bonding.
  • You need to be able to explain the physical properties of ionic compounds using lattice structure.
  • The key ideas to know are ion and lattice.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

ionlattice

Why it matters

This objective helps connect Ionic bonding to exam-style questions, flashcards, and revision notes for Bonding.

Quick student answer

Which of the following best explains why ionic compounds generally have high melting points?

Direct answer

Ionic compounds have strong electrostatic forces between oppositely charged ions.

Key terms

  • Lattice energy: The energy released when gaseous ions combine to form one mole of an ionic solid, reflecting the strength of electrostatic forces in the crystal lattice.
  • Coulombic attraction: The electrostatic force of attraction between oppositely charged ions, which is the primary force holding an ionic lattice together.

Common trap

Confusing lattice energy with ionisation energy: Clarify that lattice energy is the energy released upon lattice formation, whereas ionisation energy is the energy required to remove an electron from a neutral atom.

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