Li+ has a smaller ionic mobility than K+ because of the:
Correct answer: B. Greater degree of hydration of Li+
- A. Larger size of Li+
- B. Greater degree of hydration of Li+
- C. Larger radius to charge ratio of Li+
- D. Smaller nuclear charge of Li+
Explanation
The correct answer is B) Greater degree of hydration of Li+. Because Li+ ions are smaller, they attract more water molecules, leading to a greater degree of hydration. This results in increased drag and thus lower ionic mobility compared to K+ ions. Option A is incorrect because Li+ is smaller than K+, not larger. Option C is incorrect because Li+ has a smaller radius to charge ratio, leading to higher charge density, not lower mobility. Option D is incorrect because nuclear charge does not directly affect ionic mobility in solution.
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