Question detail
Explain how the lattice structure of ionic compounds contributes to their high melting points.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Bonding
Question
Explain how the lattice structure of ionic compounds contributes to their high melting points.
Answer
Ionic compounds have high melting points due to the strong electrostatic forces of attraction between the oppositely charged ions in the lattice structure. These forces require a significant amount of energy to overcome, resulting in high melting points.
Explanation
This answer is strong because it directly links the lattice structure to the physical property of melting point, demonstrating an understanding of ionic bonding. The question tests the ability to explain how structural features influence physical properties.
Common mistake
Misunderstanding Ionic Lattice Strength
Students often confuse the strength of ionic lattices with the size of the ions alone, neglecting the effect of charge.
To correctly explain ionic lattice strength, remember that it is influenced by both the charge of the ions and their ionic radii. Use the formula for lattice energy, which indicates that higher charges lead to stronger attractions. For example, when comparing NaCl and MgO, MgO has a higher lattice energy due to the +2 charge on Mg compared to the +1 charge on Na. Therefore, the ionic lattice strength increases with higher ionic charges and smaller ionic radii.
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