Question detail
How does ionic radius affect the strength of an ionic lattice?
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. Smaller ionic radius leads to stronger lattice strength.
- B. Larger ionic radius leads to stronger lattice strength.
- C. Ionic radius has no effect on lattice strength.
- D. Lattice strength is only determined by ionic charge.
Answer
Smaller ionic radius leads to stronger lattice strength.
Explanation
A smaller ionic radius allows ions to be closer together, increasing the electrostatic attraction between them. This results in a stronger ionic lattice compared to larger ions, which are further apart.
Common mistake
Misunderstanding Ionic Lattice Strength
Students often confuse the effects of ionic charge and ionic radius on lattice strength, thinking that only one factor influences it.
To relate ionic lattice strength to charge and ionic radius, use the rule that higher charges and smaller ionic radii lead to stronger lattices. For example, the lattice energy (U) can be calculated using the formula: U = k * (Q1 * Q2) / r, where Q1 and Q2 are the charges of the ions and r is the distance between them. Substituting values for two ions, such as Na+ and Cl- (Q1 = +1, Q2 = -1, r = 0.227 nm), gives U = k * (1 * -1) / 0.227. This shows that increasing the charge or decreasing the radius increases the lattice strength. Therefore, the conclusion is that ionic compounds with higher charges and smaller ionic radii have stronger lattices.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.