Question detail
Why do ionic compounds generally have high boiling points?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Bonding
Question
- A. They have strong covalent bonds.
- B. They have strong ionic bonds in a lattice structure.
- C. They have weak intermolecular forces.
- D. They are composed of large molecules.
Answer
They have strong ionic bonds in a lattice structure.
Explanation
Ionic compounds have high boiling points due to the strong electrostatic forces of attraction between oppositely charged ions in a lattice structure. This requires a significant amount of energy to break these bonds during boiling.
Common mistake
Misunderstanding Intermolecular Forces
Students often confuse the strength of intermolecular forces with the boiling point of a substance, thinking that all substances with high boiling points have strong intermolecular forces without considering molecular size and shape.
To accurately explain boiling point trends, remember that stronger intermolecular forces lead to higher boiling points, but also consider how molecular size and surface area affect these forces. For example, larger molecules have more surface area for London dispersion forces, which can increase boiling points despite weaker individual interactions.
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