IB Chemistry HL 2.1.3 Ionic Compounds Questions
Use exam questions to connect three-dimensional ionic lattices and ion mobility with melting, conductivity and solubility.
- Syllabus
- First assessment 2025
- Course
- Chemistry HL
- Level
- HL
Exam points
- Represent an ionic compound as a giant three-dimensional lattice of alternating cations and anions held by electrostatic attraction.
- Explain melting, brittleness, volatility and electrical conductivity from lattice structure and whether ions are fixed or mobile in the stated state.
- Use ionic-lattice structure and ion mobility to interpret solubility or compare an ionic compound with a molecular/covalent substance.
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IB Chemistry HL 2.1.3 Ionic Compounds Questions question 1
[Maximum number: 2]
Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.
Describe the structure and bonding in solid magnesium oxide.
«3-D/giant» regularly repeating arrangement «of ions»
OR
lattice «of ions»
electrostatic attraction between oppositely charged ions
OR
electrostatic attraction between Mg^2+ and O^2- ions
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