Giant Ionic Lattices
Chemistry: Cambridge International A Level, topic 1.4.6
Ionic Lattices
Ionic compounds have a lattice structure.
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Giant ionic lattices
- Ionic compounds have what is called a giant ionic lattice structure.
- This means that the structure is made of repeating units of identical structure.
- Different compounds can have very different lattices.
- E.g. Sodium chloride (NaCl) has a cube-shaped lattice.
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Properties
- Ionic compounds have certain specific properties:
- They dissolve in water - this is because water is polar.
- They conduct electricity when molten or dissolved.
- This is because the ions can move and carry charge when molten or solvated.
- They have high melting points.
- This is because the ionic bonds are very strong.
Test yourself on Giant Ionic Lattices
When do ionic compounds conduct electricity?
Which of the following are properties of ionic compounds?
Which of the following is NOT a property of ionic compounds?